Stork Francis Orval French Horn Mouthpieces

Stork Francis Orval French Horn Mouthpieces feature a medium-deep, bowl-shaped cup, a medium backbore with a straight taper, and a .183" bore. The series offers nine inner diameter sizes, from O 4 to O 6, with variations in rim width and diameter to accommodate different playing preferences.

Key Specifications:

• .183" (4.646 mm) bore
• Medium backbore with straight taper
• Medium-deep, very bowl-shaped cup
• O 4: Inner diameter .656" (16.662 mm); outer diameter .948" (24.079 mm); rim width .131" (3.327 mm); cup depth 1.254" (31.851 mm)
• O 4 1/4: Inner diameter .664" (16.865 mm); outer diameter .953" (24.206 mm); rim width .131" (3.327 mm); cup depth 1.284" (32.613 mm)
• O 4 1/2: Inner diameter .668" (16.967 mm); outer diameter .954" (24.232 mm); rim width .135" (3.429 mm); cup depth 1.284" (32.613 mm)
• O 4 3/4: Inner diameter .676" (17.170 mm); outer diameter .970" (24.638 mm); rim width .135" (3.429 mm); cup depth 1.284" (32.613 mm)
• O 5: Inner diameter .683" (17.348 mm); outer diameter .974" (24.739 mm); rim width .135" (3.429 mm); cup depth 1.264" (32.105 mm)
• O 5 1/4: Inner diameter .688" (17.475 mm); outer diameter .979" (24.866 mm); rim width .135" (3.429 mm); cup depth 1.283" (32.613 mm)
• O 5 1/2: Inner diameter .698" (17.729 mm); outer diameter .985" (25.019 mm); rim width .135" (3.429 mm); cup depth 1.283" (32.613 mm)
• O 5 3/4: Inner diameter .704" (17.881 mm); outer diameter .990" (25.146 mm); rim width .135" (3.429 mm); cup depth 1.283" (32.613 mm)
• O 6: Inner diameter .707" (17.957 mm); outer diameter .994" (25.247 mm); rim width .135" (3.429 mm); cup depth 1.315" (33.274 mm)