[Size] - Wheel Dia: 50mm / 2 Inch; Capacity: 17.5kg / 38.5LBS per wheel [Mounting Size] - Mounting Hole Diameter: 4mm / 0.16 Inch;Hole Center Distance: 27mmx27mm / 1.06 Inch x 1.06 Inch [Material] - The caster wheel is made of nylon, it rolls smoothly…