SMALL BASE + EXTERNAL BRAKE + 100mm REFLEX + STD INTERNAL REFLEX BRAKE BBG - NF#2 - O12SUGESTED CALIBERSelectADDED LENGTH (mm):176OVERALL LENGTH (mm):277DIAMETER (mm):50WEIGHT (g):598COMPONENTS SelectTHREADM12 X 1 M13 X 1 M14 X 1 M16 X 1 M18 X 1 & IMPERIAL