New TFL Arenson Drive with 1/4" (6.35mm) Prop Shaft For detailed specs, see image three. For replacement bearings, etc., see image four. Specs: 1/4" (6.35mm) Includes 1.5mm Steering Cable with linkage ends Square Drive Cable Length from transom to prop is 130mm Mounting plate: 54mm wide x 46mm tall Requires: (1) 5/16" K&S tube (1) 11/32" K&S Tube. (1) 1/4" Square drive cable (1) 1/4" Teflon Tube (1) T style servo horn with servo and NOTE: The teflon needs to be run within a 5/16" K&S tube, Then the 5/16" tube and teflon will be installed inside of the larger 11/32" K&S Tube.