Play your way. This Vac-U-Lock(TM) attachment in smooth silicone features an abstract phallic design with a stimulating molded head and can be used with any Vac-U-Lock(TM) compatible harness or accessory. The Smooth Silicone Attachment is also o-ring harness compatible. Vac-U-Lock(TM) 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 in (16.51 cm) Insertable/Usable Length 6.25 in (15.88 cm) Width/Diameter 1.5 in (3.81 cm) Circumference 5 in (12.7 cm) Material SIL