Play 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 world’s 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. Color Black. Total length 6.5 inches, insertion, usable length 6.25 inches, width, diameter 1.5 inches, circumference 5 inches. Material Silicone.