Used Austin Custom Brass TA1-CS trumpet mouthpiece

Pre-owned Austin Custom Brass TA1-CS trumpet mouthpiece in the "Standard" blank. This mouthpiece has the TA1 rim and ACB "CS" cup combined with a short shank backbore. This mouthpieces features a semi-flat rim with a C cup. 

From ACB:

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