1 complete set for couples for the world's only Modular Sex System. Vac-U-Lock Modular System Ultra Harness 2 & Plug with 8" Dong Set 3 black vinyl harness with red Vac-U-Lock plug that you can use with the 8 inch vinyl rubber dong that comes with it. Securely strap on your nylon harness then attach any of a selection of dildos. This harness has an adjustable waist up to 53 inches, an open crotch for maximum comfort, easy access, and non-slip action. Designed to give you command and control for your erotic pleasures. Vac-U-Lock plugs attach with Velcro or snaps. Set 3 includes: 8 inches dong, harness, powder lubricant, plug. Phthalate free, non-toxic materials: Sil-A-Gel, PVC dong, ABS plastic plug. Vac-U-Lock Harness, Strap-On System, Full Back, Open Crotch, Snap-On Plug with 8 inches realistic cock. Details: Dimensions 8.40 inches Length, 1.80 inches Width, 4.40 inches Depth. Insertable Length 7.50 inches. Waist Size Up to 53 inches. Ultra Harness is a registered trademark for Doc Johnson Novelties. New image added May 22, 2013.