Features: • The adjustable skates are actually 2 skates each. They are connected by two steel rods making one skate adjustable from 500mm to 1400mm (model CM60) and 720mm to 1500mm (model CM120 and CM240). • Model no. “-N” means the wheels are made of Nylon • Model no. “-P” means the wheels are made of Polyurethane material Capacity - 6 Ton Load Wheels - 6pcs Wheel Size - ø 82mm x 100mm (3.2" x 3.9”) Skate Size - 345mm x 270mm x 110mm (13.9" x 10.6" x 4.3”) Weight - 25Kg (55Lbs)