How to find out what size roller blind kit you need.
1. Remove either end of the tube, the part should just slide out.
3. Next, measure the external diameter of the tube. This is important, not the inside.
4. See the photos below as a reference for your tube. If your tube is different, email us with photos of the end of the tube and the sidewinder (the sidewinder is the part which raises and lowers the blind)
Standard sizes are 18mm, 25mm, 28mm, 32mm and 40mm.
There is a 38mm (Inside diameter of the tube) system which is the same as a 40mm tube.
If you have a 36mm external diameter tube, unfortunately, we do not stock this size. However it is often available on eBay with different sellers.
Below is the 40mm tube