All 16g tube constructed, 100 cm dia wheel revolve smoothly with C.I drum & is fitted with calibrated sensitive resistance mechanism, the resistance is Control able from zero to maximum. A 360 deg. Scale is provided on the drum to measure and record the degree of revolution from either direction. Arc of motion can be varied from 30cm to 80cm dia. Wheel is mounted on three laminated hardwood wall boards and two boards are fitted with Two stainless steel channels (80cm H x 6cm W) to give wheel 48cm height adjustment to suit each patient. Oven baked finish.