Sizes: Width Range: 17.7" - 22.8"/ Length Range: 19.6" - 23.6". Weight Endurance: 770 Pounds. It corresponds to drum type and large fully automated washing machine Easy to move with casters! It is convenient for cleaning and reworking Applicable models: dryers, washing machines, refrigerators, cabinets, pans, air conditioners, refrigerators, furniture, etc. Caster with lock, high mechanical strength, withstands abrasion, suppresses vibration, and does not damage the floor. : This Multi-functional movable adjustable base is a high performance product.You can put your dryer, washing machine and refrigerator on this multi-functional base easily and safely. It has a maximum weight limit of 770lbs and is easy to assemble. It use button-type lock, not need screw. This adjustable dolly has rubber swivel wheels that make moving heavy objects a breeze, and the rear locking wheels ensure your furniture will not roll. Features: Easily adjust the sturdy stainless steel bar to suit the larger furniture. Maintaining ventilation of the bottom, anti-rust Effectively reduce the washing machine vibration and noise Maximum weight limit of 770 lbs(4wheels), 1100lbs(8wheels) Ultra-strong rigidness, press resistance and anti-corrosion Best quality and good material guaranteed Specifications: Height: 5 inches Maximum Width: 22.8 inches Minimum Width: 17.7 inches Maximum Length: 23.6 inches Minimum Length: 19.6 inches