Use of rings fitness pull-up rings helps children's growth, pull-ups and stretches, which can cultivate children's interest in sports and train the unification ability. Our rings are made of material and are very flexible. Sweat-absorbent hand tape reduces wear and tear and has a good grip, which prevents sweat from slipping off and causing accidental injuries Our rings have a safe load capacity of 330 pounds, high strength nylon material, not easy to break, adjustable length, strong and stable buckle, easy to adjust the length of the webbing rings with fabric straps are high load bearing and metal buckles easy to quickly adjust the length to achieve the comfortable position you need Color:B:Black Material:PP+Nylon Package Contents: 1 pair * rings Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.