JK (Josef Klier)
4EM
One PieceM-Series
Official source link providedPrice basis: RetailerLast checked: Jan 29, 2026
Specifications
Cup Diameter
16.50mm
16.50mm18.50mm
Cup Depth
Medium Shallow
Cup Shape
bowl
Bore Size
4.00mm
3.80mm4.80mm
Rim Shape
Flat
Other Brand Similar Specs
Spec proximity does not guarantee actual feel or tone. Trying before purchase is recommended.
Osmun B (Bloom)Medium Similarity
Cup Diameter: +0.01mmBore: +0.80mmCup shape data unavailable
Specs used: 4 / missing: 1
Alexander 4Medium Similarity
Cup Diameter: SameBore: -0.30mmCup Depth: medium shallow → shallowCup shape data unavailable
Specs used: 4 / missing: 1
Bach 12Low Similarity
Cup Diameter: SameBore: +0.50mmCup Depth: medium shallow → mediumCup shape data unavailable
Specs used: 4 / missing: 1
Osmun H (Haydn)Low Similarity
Cup Diameter: +0.01mmBore: +0.50mmCup Depth: medium shallow → shallowCup shape data unavailable
Specs used: 4 / missing: 1
Osmun CH (Chicago)Low Similarity
Cup Diameter: +0.01mmBore: +0.62mmCup Depth: medium shallow → mediumCup shape data unavailable
Specs used: 4 / missing: 1
Osmun One-Piece ChicagoLow Similarity
Cup Diameter: +0.01mmBore: +0.62mmCup Depth: medium shallow → mediumCup shape data unavailable
Specs used: 4 / missing: 1
Other Models by JK (Josef Klier)
User Reviews
Where to Find
This site does not sell mouthpieces. Links are provided for reference only. Please verify prices and availability directly with retailers.