JK (Josef Klier)

4AM

One PieceM-Series
Official source link providedPrice basis: RetailerLast checked: Jan 29, 2026

Specifications

Cup Diameter
16.50mm
16.50mm18.50mm
vs. All Models
9% · Small
Cup Depth
Very Deep
Cup Shape
bowl
Bore Size
4.80mm
3.80mm4.80mm
vs. All Models
93% · Large
Rim Shape
Flat
Recommended For
High HornBright Tone
View on official site

Other Brand Similar Specs

Spec proximity does not guarantee actual feel or tone. Trying before purchase is recommended.
Osmun G (Geyer)Medium Similarity
Cup Diameter: +0.01mmBore: SameCup Depth: very deep → mediumCup shape data unavailable
Specs used: 4 / missing: 1
Osmun B (Bloom)Medium Similarity
Cup Diameter: +0.01mmBore: SameCup Depth: very deep → medium shallowCup shape data unavailable
Specs used: 4 / missing: 1
Osmun CHD (Chicago Deep)Low Similarity
Cup Diameter: +0.01mmBore: -0.18mmCup Depth: very deep → deepCup shape data unavailable
Specs used: 4 / missing: 1
Osmun LD (London Deep)Low Similarity
Cup Diameter: +0.01mmBore: -0.18mmCup Depth: very deep → deepCup shape data unavailable
Specs used: 4 / missing: 1
Osmun L (London)Low Similarity
Cup Diameter: +0.01mmBore: -0.18mmCup Depth: very deep → medium deepCup shape data unavailable
Specs used: 4 / missing: 1
Conn 5Low Similarity
Cup Diameter: +0.01mmBore: -0.15mmCup Depth: very deep → mediumCup shape data unavailable
Specs used: 4 / missing: 1
Bach 12Low Similarity
Cup Diameter: SameBore: -0.30mmCup Depth: very deep → mediumCup shape data unavailable
Specs used: 4 / missing: 1

Other Models by JK (Josef Klier)

01AKK-Series18.50mm · Very Deep · 4.80mm01BKK-Series18.50mm · Deep · 4.60mm01CKK-Series18.50mm · Medium Deep · 4.40mm01DKK-Series18.50mm · Medium · 4.20mm01EKK-Series18.50mm · Medium Shallow · 4.00mm

Where to Find

View on Official Sitejk-klier.de
Search on GoogleGoogle Search

This site does not sell mouthpieces. Links are provided for reference only. Please verify prices and availability directly with retailers.