This man toy is designed with superior materials and production. thus increasing both comfort and lifespan. The iconic Boneyard-branded design has a sleek silicone finish and features a superior and durable 3X-stretch. The soft medical grade silicone rings and non-roll design provide a snug fit that both the wearer and his partners will appreciate. Keep you hard longer and stronger. Safe with all lubricants. Measures 40mm (1.6 in.).