Vernier and Quadrant Style Control Cables. Several Sizes, Styles, and Applications. Engine control cables are available in vernier and push-pull styles. Several different lengths are available so try to measure your application before ordering. Routing will make a difference. The length of the cable is measured from tip-to-tip on the quadrant cables (CT Q-XX) or from the mounting surface of the vernier style cable (CT V-XX) to the tip of the cable when the control is in the forward position. All cables are "bulkhead mounted". This means the outer sheathing is captured on each end with nuts. A swivel of about 15 degrees allows the ends to flex without wearing the cable.