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. May separate if you only need one. Bought for 2 new machines that I didn't use. Cash only/no delivery. Include a phone contact for faster reply.