Sorry for confusion - the foam used is a closed cell foam block that we cut into cylinders, sounds like the same stuff - but thanks for the offer anyway. Reason I asked about the poly balls was that I couldn't really tell from the photo and they aren't as good as foam products - as you probably know - so I was going to offer to send you some - but it seems you have some already Colours of foam blocks we use are black, white, yellow, pink, red, orange, purple and lime green - more colours seem to come out each year - as with everything in fly dressing !!