roller,aluminum,alloy 6061,t6,alodized; 2.683 in. min,2.688 in. max length; 0.297 in. min,0.303 in. max od; bearings,ball,annular,steel,corrosion resisting,two; 0.2498 in. min; 0.2500 in. max od; 0.094 in. nom width general characteristics item description