National 8502 Stacking Chair, Polypropylene Seat, No Arm, Gray, PK4 29946035 Torque range: 150 750 ft Torque range: 150 750 ft Newton Meter Rotation Clockwise Ratcheting Yes Standards DIN EN ISO 6789:2003 Type II Class A Setting Manual Calibration Certificate Included Yes Primary Scale Increments 5 N m Primary Scale Range 60 N m to 300 N m Secondary Scale Range 35 ft lb to 220 ft lb Min Foam Cushioned Waterfall Seat Weight Capacity 300 lb Green Environmental Attribute Product Contains a Minimum of 30% Post Consumer Recycled Content Cushion Thickness Not Padded Frame Color Chrome Arm Style No Arm Assembled Unassembled Assembled Back Material Polypropylene Seat Material Polypropylene Frame Material Steel Item Stacking Chair Series 8500 Seat Color Gray Caster Type Hard plastic glides Standards ANSI BIFMA Arm Style No Arm