This new 1.35 kg (3 lb) counterweight is designed for SkyTracker Pro and SkyGuider pro counterweight package (#3324), as well as other iOptron mounts, which include:
SkyGuider Pro
AZ Mount Pro
CEM26
ZWO AM5
GEM28
HEM27
SkyGuider
CubePro
Cube*
CEM25/ZEQ25
iEQ30 Pro/iEQ30
CEM40/CEM40EC** (early version with 20mm diameter CW shaft)