ANVER Vacuum Cups and Suction Cups Model: 20-30 LOCKING SPACER Part Number: A-3150140 ANVER and P-Series Description and Part No. Notes Item Weight oz. (grams) Level Compensator Suspensions (Click Image for More Info) 20-30 LOCKING SPACER A-3150140 31.50.140 The 20-30 Locking Spacer is used with the above 20-30 Connection Plate. It presses in from the bottom. 0.007 (0.2)