Vac-U-Lock - G-Spot - Silicone - BlackPlay your way. This Vac U Lock attachment in smooth silicone features a curved design for g spot stimulation and can be used with any Vac U Lock compatible harness or accessory. The G Spot Silicone Attachment is also o ring harness compatible. Vac U Lock is the worlds first and only patented pleasure system, revolutionizing harness play and offering endless possibilities to mix and match within your collection to build the perfect toy. Silicone