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An in depth look at and discussion of the B.E.R.P. (Buzz Extension and Resistance Piece) developed by trumpeter Mario Guarneri.
To purchase the B.E.R.P. visit: berp.com
When you check out, type the word "twenty" in all lower case letters without the (" ") marks to receive a 20% discount on your order!!! Thanks to Miles Guarneri for doing this discount for my viewers!!!