Vac-U-Lock Accessories Ultra Harness 2 Just with Snaps Bulk. Harness with Velcro and snaps no plug incorporated. Presenting Doc Johnson's Ultra Harness II. This harness comes with an adjustable waist as much as 53 inches, a wide open crotch for optimum comfort, quick access, and non-slip action all designed to provide you with command and control for the erotic pleasures. This Harness may be used by people. The outlet underneath the plug is sufficient to permit the man's penis to hold below. Just incorperate your favorite Doc Manley Vac-U-Lock attachment and you are all set to go! You can buy another Vac-U-Lock plug or dong that attaches with Velcro or snaps. This Harness may be used by people. The outlet underneath the plug is sufficient to permit the man's penis to hold below. Made using phthalate free, non-toxic materials: Vinyl and Nylon. Waist sizes 26 to 53 inches. Vac-U-Lock is really a US patented harness attachment system. Vac-U-Lock Modular Sex System Accessory from Doc Manley Novelties the truly amazing American Toy Company. Please be aware the packaging has altered around the Vac-U-Lock Sex System. 16