I'd be interested if it was a new, tried and tested design that is better than the ones I can get now. You'd have to be careful you aren't infringing patents etc for existing products.
Im afraid its just plain old shs sears, they tend to retail for around £30 a set ( £28 on ASPUK ) so i thought some people might be interested in getting them £10 cheaper
I could sell them for £15 which would be half the rrp if i got enough people interested though