features:<br />- the shaft is suitable for put a 4mm propeller・ with water cooling( water packup) designed for small size nitro / electronic boat  deep-vee mono・ hydro or cat hulls.<br />- suitable for electric boat or small methanol tankers. cnc lathe precision hining.<br />- pure aluminum alloy manufacturing・ hard・ good quality<br /><br />specification:<br />- blade length: 115mm<br />- material: aluminum<br />- color: silver<br /><br />package:<br />1 x 115mm aluminum rudder<br />