This Powr-Grip Flip Handle Vacuum Cup has an all-aluminum casting which incorporates the pump housing and handle together for strength and protection for the pump. The 6 inch (152 millimeter) Powr-Grip Cup can handle most loads of the larger cups, but in a smaller package. The size makes this product easy to carry in a large pocket or small tool box. The rubber cup has a dual seal system to protect against vacuum loss. A plastic cover is included for protection against cuts and nicks.