Material: The cage is made of polycarbonate. The whole set includes: 1. One cage. 2. Five rings. 3.Loking pins and spacers. 4.Five individually numbered plastic locks. 5.One brass padlock with two keys. Weight: net weight about 185g Package by box. Size: Cage size: Length 2.75" (70mm) diameter 33mm. Ring size: 5 different inside diameter about 1.38''/1.50''/1.69''/1.81''/1.93''(35mm/38mm/43mm/46mm/49mm). Cleaning: Use a mild soap and soft type brush (toothbrush) for cleaning. Do Not use household cleaning . Please pay attention to the principle of safety, sober and non compulsion. It is recommended to apply baby skin oil, lubricants or similar products before use, so as to lubricate.