NB PRO TACKLE Bait protector is a very stong and tough shrink tube for wrapping your hookbait in waters with lots of crayfish or poisson chat.
Just steam it over boiling water and it will shrink and protect your hookbait.
Bulk pack with 10 bait protectors. Be aware most other companies sell them in 2-3 per pack.
Small version fits to 10-18mm diameter.
Large version fits to 15-24mm diameter.