Specifications Rings: Black high-grade ABS plastic material Max Load is 400kg Internal Diameter: 18 cm External Diameter: 23 cm Straps: Black high-grade ABS plastic material, Non-slip surface Anti-skidding design Quick adjustment Width: 2.5cm Length: 4m Package 2 x gymnastic rings 2 x High strength nylon straps with steel buckle Brand Unbranded MPN Does Not Apply UPC Does not apply UPC Does not apply .