At 19.5" in length (18.5" usable), this is the standard shaft for the 1200 series of mounts, and the "long" version for the 900 series. It, however, sets a new standard for all with its perfectly matched components.
The threads on the mount end of the shaft have a lead-in to help prevent cross threading. We machined matching female threads into the far end of the counterweight shaft, to accept the new 9" extension (M12675) so that you don'''t have to order the 28" shaft for a larger scope. The washerless Safety Stop (M12676) is a required accessory for this counterweight shaft.
Like its predecessors, this 1.875" diameter counterweight shaft is precision machined from solid 303 stainless steel. It is both beautiful and robust and has a soft luster that belies its rigid strength. It can hold up to six 18 lb. counterweights and one 10 lb. counterweight.