Anodized Aluminum (Alloy Of Zinc, Aluminum And Copper) Rotating Chest Piece With Built-In Black Rubber Non-Chill Ring • One-Piece ‘Y’ Tubing Provides Good Transmission • Length Tube 53 Cm • Diaphragm Diameter 40 Mm, Bell Diameter 20 Mm • External Binaural Spring • One Pair Extra Black Rubber Mushroom Ear Tips Included For Extra Inquiry. Packaging: Piece