closed cell foam?

a marimba, you should maintain in mind: question JaxxiRayLP ? closed cell foam in an attempt to make a marimba made of PVC (not so) anyway I tried to use the bottom of my flip-flop and I was able to get a lot of noise in the pipes ... I looked at what the Blue Man Group employed for mallets and I paddle closed cell foam for an answer? What is it? and as a Ping-Pong paddle would perform Greatest answer: response from pzifisssh "closed cell foam ... ..." Any form of synthetic rubber or

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