Celestron CGEM Counterweight Extension. Increase the effective counterbalance of the counterweight by adding a longer counterweight bar. This bar is constructed from 303 Stainless Steel. Included with the counterweight bar is a large rosette style hand toe saver stop. Works with CGEM and CGEM II as well as SkyWatcher EQ6’s and Orion Atlas mounts. M12-1.75mm thread. 22” long, .75” diameter, Wt. as shown. 48 oz.