Monel pistons Monel pistons are resistant to corrosion and are an ideal choice for professional baritone pistons which must retain precise fit and smooth action over many years. Hand-lapped pistons Hand-lapping is a time-consuming finishing process which results in superior valve fit for noiseless, responsive action and easy tone changes. Hand-lapped slides Hand-lapping achieves the perfect balance between airtightness and smooth action. | 
