All Wheels Manufacturing replacement derailleur hangers are produced in their Colorado shop to exacting tolerances. – CNC machined 6061 aluminum – Black anodized finish – Novara #Q28-4139 – (2) M4x8 Flat head screws included Note: This dropout is very similar to Wheels Mfg DROPOUT-243. Look carefully at the machined cutout on this hanger and Wheels Mfg DROPOUT-243 to determine which hanger fits your frame.