5kg Counterweight for GEM45/CEM70 

Features This newly designed 5kg (11lb) counterweight (CW) uses compression ring to lock the CW onto a CW shaft. Comparing to traditional "point contact" locking mechanism via a locking screw and a pin, the compression ring provides more secure locking method through distributed surface contact. This CW is designed for following iOptron Mount:  CEM70/CEM70G CEM60/CEM60EC GEM45/GEM45EQ iEQ45/iEQ45 Pro It can be used for other mount with a 28mm diameter counterweight shaft. Specifications Weight: 5 kg (11 lbs) Outer diameter : 148 mm (5.8") inner diameter: 28.5 mm (1.12") Height: 38 mm (1.5") Locking mechanism: Locking screw with compression ring Locking screw thread size: M8 Actual dimensions, except inner diameter, may be different.