Vintage Conn "Steelay" Hard Rubber Mouthpiece. Tip opening is a 5. As the photos tell this mouthpiece is in great physical condition for its age, still sporting its original paint on the logo. These mouthpieces have a large chamber and take the air well. Tip and rails are original and show no signs of trauma. I was keeping around to reface but am clearing out some gear and selling it as is. No case, I will pack to ensure safe delivery.