www.tet-emtron.com

A 550mm extension to turn any 80m whip into a 160 whip. Simply screw this extension between your 80m whip and the spring to use it on 160m.
Made out of thick walled 20mm fibreglass for rigidity and better Q. Coated with waterproof glue lined heatshrink and then sealed using black epoxy to stop water ingress.
Use it with the HFTW  http://www.tet-emtron.com/product-p/hftw.htm
Features.
*550mm long
*500 grams
*Waterproof
*Extra strong
*Australian standard 1/2" BSW threads.