​​​​​​​These winder Bungs from Middy allow you to easily fine tune the tension of your elastic by winding it on and off the retainer.

The bung extractor rod quickly screws in to the bottom of the bung allowing you to quickly remover the bung and adjust your elastic tension even while on the bank. 

1pr pk

size guide:

1-8 elastic bung base dia 14.5mm

8-14 elastic bung base dia 20.0mm

14-22 elastic bung base dia 30.00mm