SEM Air Compressors are designed for use with SEM’s pneumatic equipment and come complete with self-contained skid cages.Available in three models.Model325: » For use with pull style clamps and mandrels up to 18" (457.2 mm). » Gasoline engine with electric start (electric motor driven optional). Model370: » For use with all self-propelled clamps and mandrels up to 32" (812.8 mm). » Diesel engine with electric start (gasoline engine or electric motor driven optional).