1STRONG LOAD BEARING: Each mobile base of the washing machine and dryer is equipped with 12 excellent wheels to increase the stress area with the floor. Possess strong bearing capacity that can bear 700 pounds at most. Allow you to easily move heavy objects and protect the floor from wear and tear 2EXTENDABLE AND ADJUSTABLE: The retractable design of the new generation of heavy equipment rollers can be freely adjusted between 2032in. The maximum extension length is 5in longer than that of the previous generation. Suitable for different sizes of electrical appliances and furniture 3STABLE AND NON SLIP: The four key load bearing points of the furniture dolly are equipped with thickened rubber non skid mats, which play the role of non skid, non vibration and noise reduction, and are equipped with brake devices, which can be fixed 4EASY TO USE: Just place heavy objects such as washing machines, dryers, refrigerators, sofas, wardrobes and other large furniture appliances on the moving slider, and they can be easily moved, which is convenient for daily cleaning and no longer breeding dirty 5MAIN USES: The moving roller Keep the electric appliance off the ground and keep the bottom well ventilated to prevent ponding and rust, useful and practical 2 x ApplianceRollers