México

It Constructed by high quality material.
It is for shaft ID 4.2mm.
It comtains 12 pieces in this package. 
Specification:
Type: arrow nocks
Material: Plastic
Color: Light Blue,Blue,Red,Yellow
Size: for shaft ID 4.2mm
Weight: 18 g
Package included:
12pcs arrow nocks+ arrow nock pin
Warm Tip:
Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering.
Please understand that colors may exist chromatic aberration as the different placement of pictures.