Yamaha

HR-31B

One Piece
Official source link providedPrice basis: RetailerLast checked: Jan 29, 2026

V cup for a traditional soft horn tone with high volume capability.

Specifications

Cup Diameter
17.47mm
16.88mm18.08mm
vs. All Models
47% · Average
Cup Depth
Deep
Cup Shape
V
Bore Size
3.90mm
3.90mm4.50mm
vs. All Models
7% · Small
Rim Shape
Medium
Recommended For
Orchestral
View on official site

Other Brand Similar Specs

Spec proximity does not guarantee actual feel or tone. Trying before purchase is recommended.
Alexander 23Medium Similarity
Cup Diameter: +0.03mmBore: +0.10mmCup shape data unavailable
Specs used: 4 / missing: 1
Stork CA (Deep)Medium Similarity
Cup Diameter: +0.01mmBore: +0.90mmcrossRef.shapeMatch
Specs used: 5 / missing: 0
Alexander 9Medium Similarity
Cup Diameter: +0.03mmBore: -0.20mmCup shape data unavailable
Specs used: 4 / missing: 1
Engelbert Schmid 9Medium Similarity
Cup Diameter: +0.03mmBore: +0.60mmCup shape data unavailable
Specs used: 4 / missing: 1
Laskey 75EMedium Similarity
Cup Diameter: +0.03mmBore: +0.72mmCup shape data unavailable
Specs used: 4 / missing: 1
Paxman 4CLow Similarity
Cup Diameter: -0.07mmBore: +0.60mmCup shape data unavailable
Specs used: 4 / missing: 1
Schilke 31BLow Similarity
Cup Diameter: -0.07mmBore: +0.60mmCup shape data unavailable
Specs used: 4 / missing: 1
Alexander 8Low Similarity
Cup Diameter: +0.03mmBore: -0.20mmCup Depth: deep → medium deepCup shape data unavailable
Specs used: 4 / missing: 1
Alexander 8LLow Similarity
Cup Diameter: +0.03mmBore: +0.30mmCup Depth: deep → medium deepCup shape data unavailable
Specs used: 4 / missing: 1
Engelbert Schmid 8.5Low Similarity
Cup Diameter: +0.03mmBore: +0.40mmCup Depth: deep → medium deepCup shape data unavailable
Specs used: 4 / missing: 1

Other Models by Yamaha

HR-29B17.07mm · Deep · 3.90mmHR-30B17.27mm · Deep · 3.90mmHR-32B17.67mm · Deep · 3.90mmHR-34B18.07mm · Deep · 3.90mmHR-29C417.08mm · Medium · 3.98mm

Where to Find

View on Official Siteusa.yamaha.com
Search on GoogleGoogle Search

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