Your sampels or drawings are welcomed also for plastic.
Alloy bobbins with high mechanic specifications are used.

Alloy bobbins with high mechanic specifications are used to stand high pressures from the yarn without getting deformed

1) 320 bobbin: dia. 37.2 x dia. 42 x 320mm
2) 270 bobbin: dia. 37.2 x dia. 42 x 270mm
3) 145-165 bobbin: dia. 145 x dia. 90 x 165 x 177mm
4)  160-165 bobbin: dia. 160 x dia. 90 x 165 x 177mm