Is there a full set of 6 strings in each pack and long enough for full size guitar?

See the product information, this will answer your query: http://www.amazon.co.uk/Martin-M170-Acoustic-Guitar-Strings/dp/B0002CZST4/ref=cm_cd_al_qh_dp_t

are they nylons or steels?

Hi there. They are steel core with a bronze wound cover on 3rd (g) to 6th string, I think, if they follow same pattern as the light ones I buy (red packet), or just possibly 4th (d) to 6th string. A wound 3rd is preferable for fine tuning but not so good for bending. Martin strings are an excellent product, especially at the price quoted. PWN

What's the difference between cutom light, extra light, light and medium? I'm not sure which one to choose...

Strings are also measured in gauges so 10 11 12or 13 so extra light is 10 custom light is 11 light is 12 and medium is 13 ... But if your a beginner or not playin long I would suggest 11 or custom light .. Should be easier on the fingers regards Cadno

i use middle strings they hurt my fingers and i muting the strings , how would i improve it , getting extra light strings?

Hi I have used normal strings and yes they do hurt, now I use light strings or extra light strings and I love them, they are easer on the finger and they sound good to, the ones I like are Elixir Acoustic light 012-053 nanoweb ultra thin coating with anti-rust plane steels. not cheap but good and they last along time, hope this helps.

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Martin MA540FX FX Flexible Core 92/8 Phosphor Bronze Acoustic Guitar Strings - Zinc Flashed Inner Core (Custom / Light, .012 - .054)

Product ID: 48848877

Details

Brand
MARTIN
Colour
Flexible Core
Instrument
Acoustic
String gauge
Custom Light
String material type
Bronze

🎸92/8 Phosphor Bronze for rich tone

🧬Zinc-flashed inner core for durability

⚖️Custom light gauge .012-.054 for playability

¥5776

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎶 Elevate your acoustic vibe with strings that never quit!

READY TO PERFORM - Complete 6-string set designed for acoustic guitars, ensuring seamless installation and consistent sound.
ENHANCED DURABILITY - Zinc-flashed flexible core resists corrosion and extends string life, so you stay performance-ready.
PERFECT PLAYABILITY - Custom light gauge (.012 - .054) offers the ideal balance of tension and comfort for versatile playing styles.
RICH RESONANT SOUND - 92/8 phosphor bronze blend delivers warm, balanced tones that make your acoustic guitar sing.
TRUSTED CRAFTSMANSHIP - Proudly made in Mexico by Martin, a brand synonymous with premium quality and reliability.

Martin MA540FX FX Flexible Core Acoustic Guitar Strings feature a 92/8 phosphor bronze composition with a zinc-flashed inner core for superior durability and tone. Custom light gauge (.012 - .054) strings provide a perfect balance of playability and rich sound, crafted by Martin in Mexico. Ideal for professional and passionate guitarists seeking long-lasting, vibrant acoustic performance.

Specifications

ASIN	B0029SYO0S
Best Sellers Rank	1,147 in Musical Instruments & DJ ( See Top 100 in Musical Instruments & DJ ) 80 in Guitar Strings
Body Material Type	Phosphor Bronze
Brand Name	MARTIN
Coating Description	Bronze plated
Colour	Flexible Core Phosphor Bronze Light Tommy's Choice 12-54
Customer Reviews	4.6 4.6 out of 5 stars (769)
Finish Type	Bronze Plated
Global Trade Identification Number	00729789390286, 00729789558013
Included Components	6 Strings
Instrument	Acoustic Guitar
Item Type Name	Acoustic Guitar Case
Item Weight	23 g
Manufacturer	Martin
Manufacturer Part Number	41Y19MA540FX
Material Type	Phosphor Bronze
Model Name	FX
Model Number	MA540FX
Number of Items	6
Number of Packs	1
Product Warranty	1.
Recommended Uses For Product	General use with acoustic guitars for various playing styles
Set Name	MFX740 Light (12-54)
String Gauge	Custom Light
String Material Type	Bronze
UPC	729789390286 729789558013

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TrustScore 4.5 | 7,300+ reviews

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¥5776

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

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The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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