Heavy duty mobile tool bases rated at 1500lbs each. Length and width is adjustable. Frame tubing is 2 3/8x1 1/2. Large base is 26 5/8x19 1/2 ID. Smaller base is 23 3/4x14 5/8 ID. Front wheels swivel and lock when released to keep machine put. Rubber pads for each corner included. Price is for both bases. Bought for 2 new machines that I didn't use. Cash only/no delivery. Include a phone contact for faster reply.