This counterweight is compatible with the Paramount ME II 1.875-in. diameter counterweight shaft. Notes: The Paramount ME II includes one (1) 1.875-in. diameter counterweight shaft and two (2) 1.875 in. bore, 30 lb. (13.6 kg) counterweights. Optional 40 lb. (18 kg) counterweights are available for heavier payloads. The Paramount ME II can optionally accept the 1.5-in. diameter counterweight shaft and 1.5-in. bore, 20 lb. (9 kg) Paramount ME and Paramount MX counterweights. Specifications* Weight: 9 kg (20 lb.) Height: 7.3 cm (2.9 in.) Diameter: 17.5 cm (6.9 in.) Bore diameter: 4.76 cm (1.875 in.) *Due to variations in the size of the stainless steel blanks, the exact outer dimensions of individual counterweights may vary, and the final weight may vary by approximately +/- 5 percent. Additional Information Weight 32 lbs Dimensions 12 × 12 × 12 in