Stainless steel control arms are intended for use with the 7/8" Control Shaft (#90-593). They bolt thru the control shaft and connect to the 3/8" size turnbuckles that in turn will couple to the cavitation plate. To obtain best performance, it is often desirable to raise or lower one corner of a cavitation plate. The staggered lengths can provide this feature and also the longer lengths provide greater travel to the cavitation plate when required.
From shaft to center of eye: 3/4"