WTT Buice Push In Mouth Piece

[davisd9]

I have a black delrin #5 push in I would like to trade for a #4.  If you have another material other than delrin I would be interested in as well and can add a #2 black delrin to make an even trade.  Would also be interest in #3 screw ins and could add a little cash for that.  Let me know what you have.  The #5 has never been hunted, more open diameter than I care for.  Feel free to PM.  Thanks!