ACB Delrin Screw Trumpet Mouthpiece Tops

Weight 1.00 LBS
Height 3.00
Width 3.00
Depth 3.00
Shipping $0.00
Color Required

Small Business Sales:  valid on any in-stock items only! (if they are sold out I will send you a note and refund your purchase) 


ACB  Delrin  Trumpet Mouthpiece Tops (all tops in ACB  standard blank)


(all ACB  tops and backbores utilize the pretty much universal  "Warburton"  threads making them compatible with many other components!)


Austin Custom Brass Mouthpieces are now available in either white or black Delrin. The feeling of delrin is a soft and warm feel that offers even more comfort to the player. It's great for players with allergies to silver or gold, for outdoor use, and also jazz musicians who prefer a warm rich tone.    

 Call the Mouthpiece Hotline with questions or to place an order! +1-781-816-9664

Here are some of the pieces available


  • Papa Bear:   This mpc is not for the faint of heart. It is an extremely large mouthpiece (.684)  which puts it around old Bach 1 diameter.  The cup is a large bowl,  throat #20 and a custom backbore to pair with this piece for the most efficiency while maintaining a HUGE sound. 
  •  New York 1:  This originally started out as a CMM scan of a very early New York Bach 1 mouthpiece.  The cup and rim are very similar,  the backbore and throat are mated with this cup to produce a very large sound shape.  A  great orchestral mouthpiece!
  • 1C:  This is my take on an older Bach 1C but improved throat and backbore combo.  It feels significantly more efficient and sounds more energized while maintaining a rich core throughout the registers.   Standard 24 and my 10/24 combo backbore are on this piece.
  • 1.25C:  This is  a take on a great 1 1/4C  mouthpiece with some refinements in bore, backbore, and throat.  To me it feels more like a 1.5C  due to the great efficiency.  


  • 1 1/2B:  This is a great sounding orchestral piece.  While not as wide as the PAPA (the diameter is like a modern 1 1/2)  the rim is comfy and forgiving.  The cup bowl is reminiscent of some rotary trumpet mouthpieces.  I've always loved those pieces except the backbores  and end shanks are really not made for conventional piston trumpets.   My pieces are and still work really well in rotary trumpets!


  • 3C:   A take on a fantastic  Bach (from the late 60's)  3C  which I have never played a 3C  like it.   I think the added mass and proper matching backbore for this piece make this a formidable  all-around mouthpiece!


  • 3CS:   Similar to the 3C  except it's  slightly smaller and also has a much more efficient entrance into the throat.  It helps the articulation and adds a lively "zip"  to the sound.   It is especially good on vintage trumpets or overly dark horns to make them "speak".


  • TA2:
    It has a cup  design which while being fairly shallow bowl shaped has an efficient entrance into the bottom of the cup to make it very efficient without brittle. The rim is semi-flat with good support and is close to a "3-ish" diameter (.664). 

    The TA1 is still my primary piece and I find it fantastic for everything but lead and show playing. That's where the TA2 comes in for me. It feels like a great show piece. I just did a gig on it playing 3 horn Sinatra arrangements and it was great to solo on and then sizzles above high C without getting smaller in sound shape. 


  • 10 1/2C:  While this is a fairly small diameter mpc it produces a big tone and  Fine high register, resonating low register. I started with this piece thinking it would a piece I'd start students on and find it very good for all players,  especially those with very thin lips and ones who want a bit more corner support.


  • 10CV:  Another new addition to the line,  this piece was made for folks who want a compact efficient commercial mouthpiece who "bottom-out" on smaller pieces.  This rim is very similar to an older Giardinelli 10 and the cup a medium shallow  hybrid v/bowl shape.  The result is a very good all-around show and commercial piece.  It's also an excellent choice for jazz soloists looking for a piece for extended solo work.  
  • 1-27Now available is my take on a fantastic vintage piece, the  1-27.  It's cup and rim are loosely based off the Al cass mouthpiece. I then used a slightly more aggressive entrance into the bowl of the mouthpiece and also a tighter backbore to make the piece zip even more.   The rim diameter is around a 7C but the rim itself is round and comfortable. The cup volume is less than a 7C for sure. It has a lot more efficiency and sparkle to the sound.
  • Ta-Lead:  This is  a model I've created for my own lead use.  This rim is extremely comfortable,  similar to an old Giardinelli 10S but rounder and forgiving.   The cup depth is shallow enough for great compression yet produces an incredibly rich tone in all registers.   Standard 28 throat and my "zip" backbore round out this model.   It's  a great lead mouthpiece for people who tend to "Bottom out"  on small cups.
  • Lead 1.25:  I've always loved the  cup  of the Shew 1.25 and have used this piece for many years.  I have personally felt the piece's weight,  straight throat,  and backbore could be improved for my own use and have designed a piece to make the piece more forgiving (especially in this blank) and gained more core in the overall sound shape.     It's a weapon for the commercial player!
  • Ta-Screech:  A new take on a classic piece... this is a very small,  high compression mouthpiece that is suprisingly easy to play.  30 throat and "zip"  backbore produces one of the most efficient pieces I've ever played! 

Product Reviews

Score: 4 out of 5 (based on 1 rating)
leave a review
Comfort piece
Written by Scotty Welch on 9th Aug 2012

Have had my delrin mp for two days now. Feels very comfortable, sound has less edge, almost mellow, softer feel on the lips, did not tire as much as with silver piece. First take, like I said only two day's (about 12 hours) of playing. But so far, love it.