£2.00 – £10.00
I have managed to source a cheaper hollow elastic, I have had it manufactured with a 0.5mm Micro Bore (normal hollow has a 0.7mm) so no flattening out. It has a single colour running all the way through rather than the two.
I have used it myself over the past few months and would say in use it is pretty much like the amber cored but with a bit more power for the same diameter.
10m, 2.0m, 2.5m, 3.0m, 4.0m, 5.0m, 6.0m