Vac-U-Lock Large Black Suction Cup Plug from Doc Johnson Novelties. Take your play time to the next level with this jumbo version of our classic Vac-U-Lock suction cup accessory. This extra sturdy suction cup base is specially designed for optimal use of our largest Vac-U-Lock attachments and topped with our classic Vac-U-Lock plug. This accessory guarantees stable hands free play with even the heftiest Vac-U-Lock attachments, but is compatible with every attachment in the Vac-U-Lock system. The cup firmly affixes to any smooth surface, and features a molded pull tab for easy removal. Product features: designed for larger Vac-U-Lock attachments. Extra sturdy suction cup base for solid hands free control. Tabbed for easy removal. Powerful adhesion to any smooth surface. Will not damage surfaces. Compatible with all Vac-U-Lock attachments. Made using phthalate free materials Thermoplastic Elastomers TPE. Vac-U-Lock. Categories: Bondage, Fetish, Kink, Sex Toys for Couples, Strap Ons, Harnesses, Body Harnesses. Video. 2022.