COMMON TRUMPET PISTON DIAMETER SIZES

Bach Stradivarius .665" 16.891mm
Bach TR300, 1530 .650" 16.510mm
Benge .658" 16.713mm
Blessing .645" 16.383mm
Buescher new (after 1965) .650" 16.510mm
Buescher old (before 1965) .682" 17.322mm
Bundy .650" 16.510mm
Conn .682" 17.322mm
Conn 16A .665" 16.891mm
Conn 19A (Japanese) .664" 16.865mm
Couesnon .668" 16.967mm
Getzen .650" 16.510mm
Holton New U.S.A .660" 16.764mm
Holton Japanese .664" 16.865mm
Jupiter .649" 16.484mm
King New .660" 16.764mm
King Cleveland .661" 16.789mm
Leblanc .660" 16.764mm
Olds before 1990 .665" 16.891mm
Olds NA10 .658" 16.713mm
Olds NA10G .650" 16.510mm
Olds NA10M .645" 16.383mm
Schilke .645" 16.383mm
Yamaha .664" 16.865mm