Key: Bb Bore: 11.69mm (.460") Bell: 4.8125" diameter plasma welded yellow brass Mouthpipe: Yellow brass Piston: Monel material with double-slotted spring barrel, enclosed stainless steel springs and silent one-point non-metal pistion guides Slides: Brass outside and inside slides, adjustable finger ring on 3rd slide, 1st slide thumb saddle Waterkey: Tuning slide and 3rd slide Finish: Clear baked epoxy lacquer Mouthpiece: 7C Case: Deluxe wood shell Options: Model T602 availble with silver plating as model T602S. Model T602 available with formed case model T602-PC.