[Size] - Wheel Dia: 40mm / 1.5 Inch; Capacity: 15kg / 33LBS per wheel [Mounting Size] - Mounting Hole Diameter: 4mm / 0.16 Inch;Hole Center Distance: 24mm x 24mm / 0.94 Inch x 0.94 Inch [Material] - The caster wheel is made of nylon, it rolls smoothly…