#6 Chunky Zip by Trebla has strong hylon teeth. for hard wearing.
Available in 14 shades.
Beware of cheaper products that only have lastic teeth.
Chunky Open End Zips - 32"
£4.00Price
Colour
https://business.facebook.com/share_by_link/1029007301298259/Emd51b7cPrc5LcH/?nonce=U3puazVUdm9Nb0V1czYzUw