4/5/6/8 Inch Heavy Duty PU Swivel Casters Wheel

4/5/6/8 Inch Heavy Duty PU Swivel Casters Wheel  Heavy duty PU castors with strong load capacity, wear-resistant and long service life. Widely used in the transportation  of logistics equipment and industrial equipment. Specifications:  1) Wheel diameter: 4" 5'' 6" 8" Heavy Duty Caster 2) Wheel Width: 20 24 30mm Industrial Caster Wheels   3) Load Capacity: 100 130 185kg Industrial Caster    4) Material: PU Polyurethane Caster Wheels  5) Bearing: Double Bearing  6) Fixed / Swivel / Brake (can be with side brake or total brake)  7) Color: Gray Features:Anti-aging,quient,vibration damping,environmentally friendly material,salt spray test 500 hours.