C Valve Trombone – PC912 $495.00 Finish Lacquer - $495.00 Silver-plated - $595.00 Quantity Sorry, this item is currently sold out. A compact C valve trombone. Specifications Key: C Bore: 0.49" (12.4 mm) Bell: 7.95" (202 mm) Special Features Stainless steel top sprung pistons Nickel slides Gold brass bell and tuning slide Lightweight foambody case