DROPOUT 283, SPECIALIZED SCS - Specialized SCS. - CNC machined 6061 aluminum. - Black anodized finish. - Attaches to frame with (2) M3x8 Flat Head Screws. - Fasteners not Included. - Replaces Specialized Part # S142600001. ~ Note: Replacement derailleur hanger for Specialized 135mm SCS system compatible frames when using a SCS 135mm road disc hub. Hanger has a 2.5mm offset to allow for proper derailleur alignment. Do not confuse with Wheels Mfg DROPOUT-146, which is for Specialized non-SCS frames. - 1 drop out per bag.