These are fantastic to easily move your fridge or stove out to clean. They are new, the package is dirty from storage. Low profile rollers should be placed on the exterior of appliances to aid in mobility and add 1-1/2 inches to the overall height 2400-lb load capacity per set (of 2) spreds the load across 32 independent wheels Adjustable length from 19 inches to 25 inches with integrated length-locking indents A great choice when heavy appliacnes need to be mobile for cleaning or installation and not recommended for laundry equipment or on hardwood or cushioned vinyl floors Thanks!