Like a collarbone, the mech hanger is a fuse that prevent your frame from being damaged during a crash or on rough encounter with the terrain. You may have only one collarbone per shoulder, but you still have the choice to get an extra mech hanger or two to face any situation that could end your ride.
1x mech hanger
This article consists of only the mech hanger. Should you be looking for a set including both the hanger and the screw see here.
The mech hanger is fitting for:
JEFFSY MK1 CF until 2018
JEFFSY MK1 AL until 2019
CAPRA MK2 from 2018 - current