●●●Technical Parameters. Material: 420 Steel and polyurethane wheels. Color: Black Bearings: 2 PCS. Steel Balls: 19 PCS. Caster Style: Swivel Caster(2 with brakes and 2 without brakes.) Wheel Width: 2.4cm/ 0.94 inch Wheel Diameter: 5.0cm/1.97inch Top Plate Size: 7.0 x 5.1cm/ 2.76 x 2.0 inch Mounting Height: 7.5cm/ 2.95 inch Mounting Hole: 1.1 x 0.8cm/ 0.43 x 0.31 inch Quantity: 4 Pack/ Set Load Capacity: 100 lbs (Per Roll) Total Load Capacity: 300 lbs(Counting 3 PCS when using.) ●●●Match Suggestion: （1）4 PCS Swivel casters, most flexible, easy to turn around, but maybe heading off in some other direction when going straight. （2）2 swivel and fixed casters(front and back match)stable and flexible, best for long term straight. （3）2 swivel and fixed casters(crossing match), General flexibility and best for long cart. Note：The height for 4 casters should be at the same，or it won't flexible when carrying, evening to turn over. ●●●Using condition. Please consider the using environment, obstacle or other special condition, likes high and low temperature, acid and alkali, or anti-static environment, choose the best casters for you.
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