Specification: Item Type: Heavy Duty Extendable Appliance Roller Material: Iron,Nylon,Silicone Shortest:Approx. 45cm / 17.7in Longest:Approx. 70cm / 27.6in Width:Approx. 5cm / 2.0in Height:Approx. 4cm / 1.6in Weight: 300kg Pulley: Double Row 24 Wheels Compatible: Universal for All Machines and Furniture with 45 to 70cm Base Weight:Approx. 1652g / 58.3oz Package List:2 x Base 2 x Nonslip Mat1 x Pry Bar Note:After moving the items, please make sure that the roller brakes are fixed to prevent the machine from shaking back and forth after it is turned on. 300KG Load Bearing: Made of high quality thick iron material, enough to withstand items up to 300KG. Widely Used: Widely used in portable washing machines, refrigerators, closets, cabinets or other furniture heavy objects. Easy To Use: Easy to disassemble, retractable base, with a pry bar to easily lift heavy objects, making it more convenient and quick to use. Double Row 24 Wheels: Equipped with 24 upgraded small wheels, moving more smoothly. Heavy furniture and household appliances can be moved easily. Easy Installation: Easy to install, no complicated installation steps or tools are required. Press the brakes on both ends to keep things steady when not in use.