Is it really 4:1 ratio because inside the box on the tubing is written 3:1

Hi, Yes, this specific ASIN is for the 4:1 ratio. The 3:1 is listed on a different ASIN.

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🔥 Seal, protect, and upgrade your wiring game like a pro!

BUILT TO LAST - Dual wall construction offers superior abrasion resistance and strain relief for demanding environments.
SEAL IT TIGHT - Heat-activated adhesive creates a waterproof, long-lasting bond that outperforms standard tubing.
SHRINK LIKE A PRO - Industry-leading 4:1 ratio ensures a snug, professional-grade fit on diverse wire sizes.
READY WHEN YOU ARE - Organized 190-piece kit keeps your workspace tidy and your projects moving fast.
VERSATILE SIZE RANGE - Includes 5 popular diameters from 1/4" to 3/4", pre-cut for quick, mess-free application.

Wirefy’s 190-piece heat shrink tubing kit features a market-leading 4:1 shrink ratio and dual wall design with adhesive lining for waterproof, abrasion-resistant insulation. Pre-cut tubes in five sizes cover a wide range of applications from marine to automotive, all UL certified for safety and durability.

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€ 44.98

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Manufacturer	Wirefy
Part Number	Wirefy-DW41-190-B-R
Product Dimensions	19.51 x 13 x 3.51 cm; 270 g
Item model number	Wirefy-DW41-190-B-R
Size	Length: 1.75"
Colour	Black, Red
Style	Black, Red - 190 PCS
Material	Polyolefin
Voltage	600 Volts (AC)
Item Package Quantity	190
Certification	UL
Batteries included?	No
Batteries Required?	No
Item Weight	270 g

Wirefy 190 PCS Heat Shrink Tubing Kit - 4:1 Dual Wall Tube - Adhesive Lined - Marine Shrink Tubing - Black, Red

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