Pos-T-Vac Ultimate II Round Tension Bands

By Timm Medical Technologies / Pos-T-Vac  |  HCPCS: E1399  |  FSA/HSA Eligible  |  Rx Required

5 Sizes — X-Small Through X-Large  |  Silicone & Gel Round Profile  |  Low Displacement  |  FDA Approved  |  60-Day Warranty  |  Latex-Free  |  Made in USA  |  Rx Required

Non-returnable personal item.

Pos-T-Vac Ultimate II Round Tension Bands are the low-displacement entry point in the Timm Medical tension ring line — a proven, FDA-approved constriction ring for maintaining erections after vacuum-assisted engorgement or for men who can achieve but not maintain erections without assistance. The round cross-sectional profile gives these rings the least material displacement (least cushioning and least surface contact area) of the Pos-T-Vac ring family, making them the most economical option and the appropriate starting point for men who are new to tension band therapy or whose ED is mild to moderate. The correct ring size depends not just on inside diameter but on the combination of size and tension level the individual needs — two men with similar anatomy may require different ring sizes based on the venous pressure needed to maintain their specific erection. Five sizes from X-Small (0.32") to X-Large (0.65") address the full clinical range. Latex-free. FDA approved. 60-day manufacturer's warranty. Made in USA. HCPCS E1399. By Timm Medical / Pos-T-Vac.

Size & Tension Reference

Smaller rings = more tension. Larger rings = less tension. First-time users without prior size information: start with Size 2 (Medium, 0.44").

Pos-T-Vac Tension Ring Family — Displacement Comparison

Key Features

• Round profile — low displacement — the round cross-section provides the least material contact area of the Pos-T-Vac ring family; less displacement means less cushioning and a more concentrated constriction point; appropriate for users who need sufficient tension and are not experiencing discomfort with standard ring geometry
• Size and tension work together — inside diameter is not the only factor — unlike a simple measurement-based fit, the correct tension ring for any individual is a combination of inside diameter and the tension (elasticity) of the ring material; two men with the same penile girth when erect may need different ring sizes because the amount of venous constriction needed to maintain an erection varies by individual; a ring that maintains the erection without discomfort is the correct ring, regardless of what size number that corresponds to
• Smaller inside diameter = more tension; larger inside diameter = less tension — within the five-size range, the X-Small (0.32") provides the highest constriction force and the X-Large (0.65") provides the lowest; the appropriate size for a given user depends on how much constriction is needed to maintain the erection effectively
• FDA approved — the Pos-T-Vac ring line carries FDA approval as a medical device for ED management
• 60-day manufacturer's warranty — Timm Medical provides a 60-day warranty on Pos-T-Vac rings
• Made in USA — Pos-T-Vac products are manufactured in the United States
• Latex-free silicone and gel construction — appropriate for users with latex sensitivity; the silicone and gel material gives the round rings their characteristic feel and stretch
• HCPCS E1399 | FSA/HSA eligible | Rx required | Non-returnable | By Timm Medical / Pos-T-Vac

Clinical FAQs

What does "displacement" mean and how does it affect ring selection?

In the context of Pos-T-Vac tension rings, displacement refers to the cross-sectional size and shape of the ring material itself — essentially, how much physical space the ring occupies and how large its contact area is with the tissue it encircles. A round ring profile (this product) has a small circular cross-section — it concentrates its constriction force at a relatively narrow contact band. A hexagonal profile (Ultimate II Hex) has a wider, flatter cross-section that distributes constriction pressure over a larger surface area. The Mach 1 rings have the highest displacement — the most material, the widest contact area, and the most cushioned feel. Higher displacement rings are generally more comfortable for extended use because the constriction force is distributed rather than concentrated, but they are also more expensive to manufacture and purchase. The Timm Medical source guidance is that men who are new to ED therapy or who are experiencing mild to moderate difficulty maintaining erections should start with lower-displacement rings (like the Round rings), while men who have experienced long-standing erectile dysfunction may benefit from higher-displacement rings that provide both effective constriction and the comfort needed for extended therapy. If a ring provides effective maintenance but is uncomfortable, the correct next step is to try a higher-displacement ring of similar or slightly larger size rather than abandoning ring therapy.

How do I select the right round ring size when inside diameter alone doesn't determine fit?

The Timm Medical guidance is that ring selection should be approached as a trial-and-error process aimed at finding the combination of size and tension that maintains the erection effectively while remaining comfortable throughout the 30-minute safe wear window. The recommended starting point for first-time users without prior ring size information is Size 2 (Medium, 0.44" inside diameter). From there: if the erection is not maintained or subsides quickly after the cylinder is removed, the ring is too large — try the next smaller size (Size 1 Small, 0.34"). If the ring is effective but uncomfortably tight, the ring is too small — try the next larger size (Size 3 Large, 0.56"). The goal is the smallest ring size (most tension) that provides effective erection maintenance while remaining comfortable enough to be tolerated for the duration of use. Some users also find that they need different size rings at different times depending on their physiological state that day; maintaining two or three sizes provides flexibility across sessions. The Pos-T-Vac Ring Kit is an alternative to individual size purchases for users who want to trial multiple sizes simultaneously before committing to a single replacement size.

Are Pos-T-Vac tension rings compatible with non-Pos-T-Vac VED pumps?

Pos-T-Vac Ultimate II Round Rings are sized for use with the Pos-T-Vac VED pump cylinder, but the tension ring function — constriction at the base of the penis to maintain erection — is the same regardless of which pump system generated the erection. Many VED users use tension rings from one manufacturer with a pump from a different manufacturer, and this cross-brand use is clinically accepted. The key consideration when using Pos-T-Vac rings with a non-Pos-T-Vac pump is the ring-loading process: the ring must be loaded onto the pump cylinder before therapy, and the cylinder's ring-end diameter and taper profile determine how easily the ring can be loaded and transferred. Pos-T-Vac rings, with their round low-displacement profile, are among the easier ring types to load across different cylinder formats. The inside diameter sizing (0.32"–0.65") is an anatomical measurement — the inside diameter that fits correctly is the same regardless of which pump created the erection. Call us at 1-866-218-0902 if you have questions about using Pos-T-Vac rings with your specific pump system.

Questions about Pos-T-Vac round tension bands, size selection, or other Pos-T-Vac ring options? Call our product specialists: 1-866-218-0902  |  Mon–Fri 9am–5pm, Sat 9am–3pm EST