These fine spiral closed end zips are used in dresses and pillowcases. For pillowcases that are tight and snug around the pillow and made from heavier fabric a size 5 zip is better, that is stronger than the size 3. Please order an spiral zip for a coat (open end) or a piece of zip on the roll, also available in our shop.
This zip is not invisible, you will see two stitches beside it. If you want an inconspicuous zip please order an invisible zip