... 4.Can used by Adult,Children 5.Safety Product NameDouble Sit &Pull DeviceSpecificationModel No.16102Unit Size180*69*200cmPlayer Age3-15( ... upper limbs and back muscles; Improve body coordination. Instruction: Sit on the seat with both hands holding the handles tightly ... . Only two persons are allowed at a time. Double Sit & Push Device,Fitness Equipment,Body Building Machine,Outdoor Playground ...