Suction Cup Mount,4.5 Dia,1/4-20x3/8
-20 x 3/8 in, Platform Material Polycarbonate, Max..Load Capacity 40 lb, Features Check Valve and Instant Release Lift Tabs, Red-Line Vacuum Indicator, Includes Vacuum Pad Protector Suction Cup Mount, Cup Size 4-1/2 in Dia, Cup Type Concave, Mounting Type Threaded Stud, Mounting Size 1/4 In.