Could you tell me the length of your 6mm allen key - 902 0376 Also you 5mm -902 0375 and 4mm allen key - 902 0374

here is the lengths of the requested allen keys. please see below: 902 0376 (6mm) = 95mm 902 0375 (5mm) = 85mm 902 0374 (4mm) = 70mm