See O rings for sale on EBAY
50 for £1.29 are best price I have seen
WHY
I have always used a thin elastic band,hold's them tight
Take the stem,place band single thickness 3-4 wraps around thread ,screw barrel on tight
2nd one do the same using remainder of band
hold loose end against stem 3-4 wraps around thread,tighten barrel on
any left do same with remainder or new band
Just bought some loom bands they were selling off
20p for a packet of 1000.......50 for a penny
They work,you have nothing to loose
50 for £1.29 are best price I have seen
WHY
I have always used a thin elastic band,hold's them tight
Take the stem,place band single thickness 3-4 wraps around thread ,screw barrel on tight
2nd one do the same using remainder of band
hold loose end against stem 3-4 wraps around thread,tighten barrel on
any left do same with remainder or new band
Just bought some loom bands they were selling off
20p for a packet of 1000.......50 for a penny
They work,you have nothing to loose