30 inch air vise has twin rails with twin motors! These rails are the thickest rail offered so there is no flexing in the unit! All aluminum plate is 1/2 inch 6061, and all plates are 4 inches tall x 12 inches wide! Comes with air pressure regulator and push-pull style valve and 10 feet of air tubing and adapter to hook up to your air compressor! Vise will hold approximately 20 molds!