Caster wheel : 82series heavy duty of6",8",10" Top plate : 1.Top plate size: 110x150mm or 135x170mm; 2.Attaching bolt size:13.3mm or 14mm; 3.Top plate thickness:8.0mm Fork: 1.Fork thickness:5mm; 2.Axle hole diameter: 13mm 3.Surface treatment:zinc Wheel: 1.wheel material: Red PU on Cast Iron 2.wheel size:160,200,250 x 50mm 3.bearing: roller bearings 4.Load Capacity:1000-2000kg