DROPOUT 138, NORCO, PINARELLO, STEVENS, EDDY MERCKX - CNC machined 6061 aluminum. - Black anodized finish. - Attaches to frame with (2) M4x8 Flat Head Screws. - Fasteners not Included. ~ Note: The mounting holes on this hanger (DROPOUT-138) are 23mm apart, center-to-center. Do not confuse this hanger with DROPOUT-120. - 1 drop out per bag.