This set of 11 includes 9 Stomvi Couplers (nos. 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6.5) and two Reeves Sleeves (nos. 6, 7). Both work with any mouthpiece cut for Stomvi Couplers or Reeves Sleeves. All are in excellent condition, with no issues that affect functionality, and have the typical marks where the shank inserts in the trumpet receiver. Currently, Stomvi sells these for $28 each plus shipping, and Reeves for $27.50 each plus shipping. So this set would cost right around $300 plus shipping if they were bought individually from Stomvi and Reeves. I'm selling this set for half that amount, with free shipping.