2 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:              2 kg                          4.5 lbs.

Outer diameter :              118 mm                    4.6 in.

  inner diameter:              20 mm                      0.78 in.

               Height:              25 mm                      1 in.