This is the standard glass gauge used with a feeler gauge set to measure the facing curve on mouthpieces. This gauge measures in 0.5mm increments (i.e.. a reading of 34 = 17mm)
This is the standard glass gauge used with a feeler gauge set to measure the facing curve on mouthpieces. This gauge measures in 0.5mm increments (i.e.. a reading of 34 = 17mm)