The closure is an internal lock which is removed when opened with the key. This cage has a testicle cage connected to the A-ring. When closing, a plastic ring is attached at the same time. 2 keys are included. The inner diameter of the cage is approx. 33mm, length approx. 80mm. Testicle cage approx. 60x40mm. The A-ring is available in 3 sizes. The material is plastic. The total weight is approx.: 100 grams.