Sunwayforo Brand Bubble Level Plate for Tripod.Inserts easily between Tripod and head.Will accomodate any 3/8" or 1/4" Tripod Stud.Weighs 1.3oz (40g).3" (76mm) internal diameter any base up to 3" will fit.14.8mm (0.6") Diameter Bubble levelOne piece metal (aluminum) plate.2mm (0.08") thick Center.Lip is 5mm (.17") tallOverall diameter 3.2" (82mm)Bubble housing extends approx 1.25" (30mm)Center Hole is 10mm (0.4") in diameter