A great choice for those seeking the balance, security and slotting of the OIRAM series, the OIRAM IV offers a bell with a slightly slower taper and more compact sound when compared to the OIRAM II.
- ML bore 11.7 mm (0.461″)
- Standard weight valve casing
- One-piece hand-hammered bell
- Bell material: yellow brass
- Bell diameter: 135 mm (5.319″)