manual slack adjuster for heavy duty trucks and trailers 3 HOLES 28 TEETH ,CENTER DIMENSION 5"6"7",FORGING ZHUJI WEILIN MACHINERY FACTORYmanual slack adjuster for heavy duty trucks and trailersmaterial: forgingcolor: golden ,black ,green etc3 HOLES 28TEETH ,CENTER DIMENSION 5"6"7" ,FORGING KN44071 brake adjuster