5-minute assembly time. Designed for residential use for children ages 2 and up with adult supervision. 350-pound weight rating per pair when used with No.PS7576 commercial-grade swing hangers. Superior strength welded link chain with black soft rubber coating, padded grip and metal grommet for strength. High-density green polyethylene, premium-grade ring construction with power grip design for rugged play. Includes 2 gym rings with chain, all assembly hardware, and easy-to-follow instructions.