The latest counterweight, weighing in at 1.35 kg (about 3 lbs), is compatible with a variety of iOptron mounts, including the SkyTracker Pro and SkyGuider Pro counterweight kit (#3324). Here's a list of the mounts it fits:

• SkyGuider Pro
• AZ Mount Pro
• CEM26
• GEM28
• HEM27
• SkyGuider
• CubePro
• Cube
• CEM25/ZEQ25
• iEQ30 Pro/iEQ30
• CEM40/CEM40EC (early models with a 20mm CW shaft diameter)
• MiniTower, MiniTower II, and MiniTower Pro

For those with Cube-A/G/E models, you'll need the CW shaft (#8607) to make it work. And if you have a CEM40/CEM40EC, double-check the CW shaft diameter before placing your order.

Specifications

Weight: 1.35 kg (~3 lb.) Outer diameter: 79 mm (~3 in.) Inner diameter: 20.5 mm (~0.8 in.) Height: 39 mm (~1.54 in.)