63ES Delrin One Piece

Was: USD $115.00
Now: USD $75.00
Ships in 1-2 weeks
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Product Overview

Delrin one-piece mouthpieces have been discontinued and will only be available while supplies last.

Top 10 Mouthpiece! Similar to Schilke 6A4A. Our most popular small diameter lead mouthpiece. 


  • Similar in diameter and cup depth to a Schilke 6A4A. 
  • ES cup provides maximum brillianceprojection, and slotting in extreme upper register playing.
  • Provides better range and endurance than a 6A4A with much better flexibility.
  • Greatly improved sound in the mid to low register compared a conventional mouthpiece of this size and depth.


  • Inner Diameter: .630 measured .04 inches into the cup
  • Outer Diameter: 1.094
  • Cup Depth: ES (Extra Shallow) cup (similar to a Schilke 6A4A, Schilke 13A4A, Bach 3E, and GR ES cup)
  • Intended for maximizing upper register performance when playing commercial lead or similar types of playing
  • Produces a bright sound excellent projection while still maintaining an accessible lower register
  • Backbore: This mouthpiece comes on a S (Small) backbore

Features of Delrin: 

  • Feels softer on the chops with more give than metal - ideal for players with braces
  • Less slippery than silver, allowing more grip
  • Added grip makes delrin mouthpieces feel smaller than their metal counterparts with identical size designation
  • More comfortable to play in cold weather 
  • More responsive than brass, making soft entries more secure 
  • Articulation less crisp with less point at the front of the note compared to brass
  • Darker sound with less core than brass
  • Some players may feel slight chop irritation for the first day or two while they adjust - this is normal and should subside 

Guarantee and Return Policy