The brown Vac-U-Lock 7-inch ULTRASKYN Thin Dong is a manual attachment for a compatible Vac-U-Lock harness, mount, or accessory. Its dual-density ULTRASKYN TPE construction combines a soft, pliable exterior with a firmer inner core. This page distinguishes the 6.5-inch insertable length from the product's 7-inch trade name and keeps an unresolved total-length difference visible.
Verified product details
| Brand | Vac-U-lock |
|---|---|
| Manufacturer | Doc Johnson |
| Product | Vac-U-Lock 7-inch ULTRASKYN Thin Dong Attachment, Brown |
| Store SKU | DJ1015-41 |
| Manufacturer / distributor MPN | 1015-41-BX |
| UPC / GTIN | 782421024444 |
| Mechanism | Manual |
| Material | Dual-density ULTRASKYN TPE |
| Construction | Soft exterior over a firm inner core |
| Insertable length | 6.5 in |
| Maximum diameter | 1.5 in |
| Maximum circumference | 5 in |
| Compatibility | Vac-U-Lock system |
| Published origin | Made in the United States |
Total-length note: The current Stag Standard catalog and multiple exact brown-product listings state 7.5 inches total length, while another current exact-product page states 7 inches total length. The sources consistently state 6.5 inches insertable, 1.5 inches maximum diameter, and 5 inches circumference. Check the received package for the controlling total-length measurement.
Set up and fit checks
- Inspect the exterior, inner core, and mounting opening before each use. Do not use the attachment if it is torn, split, unusually tacky, discoloured, separating, deformed, or contaminated.
- Confirm that the harness, plug, mount, or accessory is designed for the Vac-U-Lock system. Seat the attachment fully according to the system instructions, then use a gentle tug test before body contact.
- Use enough compatible lubricant to reduce friction. Water-based lubricant is a conservative starting point for TPE; check both labels and spot-test an inconspicuous area when compatibility is uncertain.
- Begin slowly and control depth and angle. The 6.5-inch insertable measurement is available capacity, not a required depth.
Stop conditions
Stop immediately if the attachment loosens, the mount shifts, the material tears or separates, or use causes sharp or increasing pain, numbness, unexpected bleeding, or another concerning symptom. Do not continue through pain or use a damaged attachment. Seek appropriate medical help for a severe or persistent injury or reaction.
Cleaning, sharing, and storage
Wash before and after use with warm water and mild soap unless the received instructions specify another method. Rinse away residue, let the attachment dry completely, and do not boil, bleach, use a dishwasher, or treat surface cleaning as sterilization unless the maker expressly allows it for this exact product.
If the attachment is shared, use a new compatible barrier for each user or body area and clean it between uses. Store it dry and separately from other soft products in a clean container or bag. Keep it away from direct heat, sunlight, sharp objects, and prolonged contact with materials that could react with TPE.
Browse harnesses and shared play, shop the Vac-U-lock brand, compare Vac-U-Lock-compatible products, review materials and care, read how to choose water-based lubricant, or check the returns, refunds, and hygiene policy.

