[Size] - Wheel Dia: 37mm / 1.45 Inch; Capacity: 12.5kg / 27.5LBS per wheel [Mounting Size] - Mounting Hole Diameter: 4mm / 0.16 Inch;Hole Center Distance: 20mm x 20mm / 0.79 Inch x 0.79 Inch [Material] - The caster wheel is made of nylon, it rolls…