4.5 kg counterweight for iOptron iEQ30^TM mount or MiniTower^TM mount. Once a CW shaft  is attached to mount the counterweight can be moved and locked in place for optimal telescope balance.

              Weight:              4.5 kg                       9.8 lbs.

Outer diameter :              118 mm                    4.6 in.

  inner diameter:              20 mm                      0.78 in.

               Height:              55.5 mm                   2.2 in.