... far more safety with high quality spring has long useful life Description of Spring Rider HLB-91035 Measurements146*128* ... L*W*H)MaterialLLDPE Plastic and iron spring.Stainless steel screws.Spring size40*38*30cmFunctionGood for improving children's ... : anti-statics,anti-crack and anti-ultraviolet,durableAge Range3--12 ageCapacity2 personsApply toCommunities, amusement park, kindergarten, pre-school, ...