Cage is manufactured from high-grade polycarbonate. a light. durable and hypoallergenic material. Consists of three parts which fit together perfectly. Two guidance pins connect the top parts and the oval taper pin connects the rings with the cage. A variety of rings in different sizes and distance pieces allow you to create the right size. The rings have a comfortable fit and are safe. A metal lock or tie-wrap lock can easily close the cage. Equipped with a variety of vents and a urination opening. The cage makes it impossible to get an erection. Waterproof. Length is 3.54 in. Outside diameter of adjustable rings is 1.77. 1.97. 2.17 and 2.36 in.