14th March, 2016 Ow, my delicate flesh! "These contact balls are almost exactly what I needed, but if you're going to use them aggressively, you should watch out! The white plastic these are made of is harder than the other colours for some reason, and I've been giving myself some nasty bruises with them. Otherwise, an excellent product." Asa, Canada. [Verified Buyer] GOLD Member since Jan 2012