This counterweight weighs in at 2.5 kg (or 5.5 lbs) and is tailored for several iOptron mounts, including:

• CEM70, CEM70EC, CEM70G
• CEM60, CEM60EC
• GEM45, GEM45EC, GEM40G
• CEM40, CEM40EC, CEM40G (Note: This is for later versions with a 28mm CW shaft)
• iEQ45 Pro
• iEQ45

If you've got a CEM40, double-check the diameter of your counterweight (CW) shaft to make sure it's 28mm before you place an order.

Oh, and by the way, you can also use this counterweight with other mounts that have a 28mm diameter CW shaft.

Specifications

Actual dimension, except inner diameter, may be different.