What is the roll of red felt for?

It is made of felt materials, applied to mute two octaves at once by pushing between the groups of strings with a screwdriver or flattened hammer shank, this is the most efficient way of setting a temperament in, save you a lot of time.

does this work for yamaha piano?

This tuning kit will work with any acoustic piano with tuning pegs and strings, whether it's an upright or not - I hope this answers your question.

Can this be used in any piano? I just got one that is a Yamaha but Im not sure if this kit is universal, is it?

This kit is pretty universal. As long as your pins are accessible, you should have no trouble. Be advised, though, that the tuning wrench is fairly short. This makes it easy to use on a variety of pianos, but on some uprights, you may want to slide a tube of some sort, i.e. a short length of PVC, over the wooden handle for better leverage. Otherwise, you may have to take off the front music stand panel, which on our upright is a royal pain. We had a tuning wrench that was much longer and more robust, but found it was too unwieldy for our upright. This one is just fine.

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Piano Tuning Kit Professional Wrench Hammer Rubber Mutes Set Including 9 pcs Tuning Tools for Piano Tuning with Tuner

Product ID: 194698620

🎵440Hz tuning fork for perfect pitch

👜compact portable storage bag

🔧9 precision tuning tools

¥4591

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In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎹 Tune like a pro, wherever you go!

SILENT MUTING SYSTEM - Rubber mutes & temperament strip for noise-free tuning
ON THE GO PORTABILITY - Compact storage bag keeps your kit organized and ready
PRECISION TUNING WRENCH - Ergonomic design for flawless pitch adjustments
ALL IN ONE TUNING ARSENAL - 9 essential tools to master your piano’s sound
PITCH PERFECT TUNING FORK - 440Hz standard for professional accuracy

This 9-piece professional piano tuning kit includes a precision wrench, 440Hz tuning fork, rubber mutes, temperament strip, and a portable storage bag, designed for accurate, silent, and convenient piano tuning anytime, anywhere.

Specifications

ASIN	B085WWKT2C
Best Sellers Rank	#3,709 in Musical Instruments ( See Top 100 in Musical Instruments ) #66 in Music Tuning Accessories
Color Name	9 piece set
Customer Reviews	4.2 4.2 out of 5 stars (714)
Date First Available	March 14, 2020
Item Weight	7.5 ounces
Package Dimensions	9.76 x 4.33 x 1.65 inches

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TrustScore 4.5 | 7,300+ reviews

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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¥4591

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

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Very reliable shop with genuine products. Will definitely buy again!

2 weeks ago

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