Monette Resonance C3FS7 Plana Trumpet Mouthpiece. - Brand: Monette - Model: C3FS7 Plana (Designed for C trumpets, size is similar to Bach 1-1/2C to 2C) - Color: Gold - Included: Box, Instruction manual Thank you for viewing. The pitch correction for difficult C trumpets is remarkable. Even when the volume is turned up to the maximum, the sound doesn't scatter. There are some scratches on the insertion part, but otherwise, it seems to be in good condition with little use. The PLANA model has a satin finish on the body.