https://altairastro.com/ioptron-counterweight-extension-bar-for-cem406070--gem45-with-28mm-bar-11814-p.asp
iOptron Counterweight Extension Bar for CEM40/60/70 & GEM45 with 28mm Bar
This is an original replacement counterweight shaft (w/o CW safety screw) and the extension bar for the iEQ45 Pro/iEQ45/GEM45. This is also the
extension barioptroncounterweight