Theo Wanne Feeler Gauge Set

This new feeler gauge set includes all sizes needed to accurately measure a mouthpiece tip opening and has both US and Metric numbering. There's even a big 3mm (.118") gauge included. You no longer need separate sets of feeler gauges for US and metric; you only need this one!

Use this feeler gauge set with one of our glass gauges to measure the facing curve on any saxophone or clarinet mouthpieces.