SEISSO Universal Movable Base Stand Wheels makes life more convenient, clean and comfortable! Free of Installation Mobile Base - According to customer’s need, this Mobile Base will come as partially assembled; The feet, wheels and panel are well assembled. And you just need to simply assemble the tubes, and you can use this roller base immediately. 4 Dual Caster Wheels - Suitable for machines or furniture which need to being move frequently, especially for carpet ground. Widely Applicable Household - It is a good helper for housewife, they can easily move the large machines by themselves now, such as washing machines, refrigerators, dryers, wine cabinets, cabinets, etc, to enhance the height, extend the life of home appliances. Features - Weight limit: 660lbs - Easy to move and clean - Easy to Assemble,Button-type lock - Balance + Expansion, adjustable size - Brake fixing function, Safer and more stable - Keep the bottom of machine ventilated, moisture-proof and anti rotten - Super rigid and tough, pressure resistant and corrosion resistant, never rusty - High grade plastic, strong toughness, wear resistance, strong impact resistance Range of Size Adjustment Length: 21.4-28.7 inch Width: 21.4-28.7 inch