Features: MATERIAL:small quadrate tube,belt transmission Accurate dynamic balanced flywheel The weight of flywheel is 13kg Durable ribbed belt driving system Quick and convenient rub resistance adjusting system Supply the unilateralism turning system PACKING:1pcs/CTN G./N.W.41/36KGS MEAS.:107.5*26.5*86cm Assembly Size:111*49*113cm 20'GP:117PCS 40'PCS:225PCS 40HQ:241PCS