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 your connections like a pro—never settle for less!

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 every time.
READY WHEN YOU ARE - Pre-cut 1.75" lengths in a neatly organized kit—perfect for quick, clean, and efficient repairs.
DUAL WALL DURABILITY - Outer abrasion-resistant layer plus inner adhesive layer for ultimate protection and strain relief.
VERSATILE SIZE RANGE - Five essential diameters from 1/4" to 3/4" cover all your wiring needs with precision.

Wirefy’s 190-piece heat shrink tubing kit features a superior 4:1 shrink ratio and dual-wall construction with adhesive lining for waterproof, abrasion-resistant insulation. UL certified and available in five common sizes, this kit is engineered for professional-grade electrical repairs and marine-grade durability.

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€ 62.48

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Netherlandsstore

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Manufacturer	Wirefy
Part Number	Wirefy-DW41-190-B-R
Product Dimensions	19.51 x 13 x 3.51 cm; 258.55 g
Item model number	Wirefy-DWT-Parent
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	259 g

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

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