Vandoren 'Series 13' Clarinet MouthpieceVandoren has been one of the top names in mouthpieces and reeds for years. The 'Traditional' Series is universally acclaimed and includes models such as the B40, B45 and 5RV. The 'Series 13' range was initially developed for American clarinet players and designed to play at A 440 pitch. The range originally included only the M13, M15 and M30 mouthpieces but quickly grew to include traditional facings such as the B40, B45 and 5RV. The 13 series