Wood's Powr-Grip LJ6VH 6" Concave Vacuum Cup with Vertical Handle Durable Metal Handle with Brass Plunger Fast Attachment on Smooth, Nonporous Flat Surfaces Red-Line Indicator Warns User of any Vacuum Loss and Lift Tabs on Vacuum Pad Edges Permit Instant Release Check Valve Allows Repumping without Loss of Remaining Vacuum Includes Protective Plastic Cover