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110PCS 3:1 Heat Shrink Tubing Kit provides six red, adhesive-lined tubing sizes for small electrical repairs, splice insulation and wiring-harness protection. Every piece is 90mm (3.5 inches) long; choose a supplied diameter that clears the widest part of the joint and recovers tightly around the cable.
| Before Diameter | Quantity | Approx. Recovered Diameter | Length | Shrink Ratio | Material | Shrink Temperature |
|---|---|---|---|---|---|---|
| 3/4 in / 19mm | 6 | Approx. 6.3mm | 90mm / 3.5 in | 3:1 | Adhesive-lined dual-wall polyolefin | 257°F / 125°C |
| 1/2 in / 12.7mm | 10 | Approx. 4.2mm | 90mm / 3.5 in | 3:1 | Adhesive-lined dual-wall polyolefin | 257°F / 125°C |
| 3/8 in / 9.5mm | 9 | Approx. 3.2mm | 90mm / 3.5 in | 3:1 | Adhesive-lined dual-wall polyolefin | 257°F / 125°C |
| 1/4 in / 6.3mm | 15 | Approx. 2.1mm | 90mm / 3.5 in | 3:1 | Adhesive-lined dual-wall polyolefin | 257°F / 125°C |
| 3/16 in / 4.8mm | 25 | Approx. 1.6mm | 90mm / 3.5 in | 3:1 | Adhesive-lined dual-wall polyolefin | 257°F / 125°C |
| 1/8 in / 3.2mm | 45 | Approx. 1.1mm | 90mm / 3.5 in | 3:1 | Adhesive-lined dual-wall polyolefin | 257°F / 125°C |
Recovered diameters are approximate values based on the specified 3:1 ratio. The listed counts total 110 pieces.
Use this assortment to insulate finished splices, cover terminal transitions, add strain relief and protect compatible automotive, marine, workshop and household low-voltage wiring. The adhesive-lined dual-wall construction supports a moisture-resistant seal when the selected size fully grips compatible cable insulation.
Do not use heat-shrink tubing as a substitute for a mechanically sound electrical connection or outside the equipment manufacturer’s temperature and installation requirements.
Do not use an open flame or continue heating after full recovery.
The kit contains 1/8, 3/16, 1/4, 3/8, 1/2 and 3/4-inch red tubing. All pieces are 90mm long, and the size counts total 110 pieces.
Choose a supplied diameter that clears the largest part of the joint, then confirm the approximate recovered diameter will grip the smallest cable section.
The tubing can recover to approximately one-third of its supplied diameter when heated correctly.
The product specification lists 257°F (125°C) as the shrink temperature. Apply controlled heat evenly and stop after full recovery and sealing.
Browse the Heat Shrink Tubing Collection, use the Heat Shrink Tubing Size Guide, compare the 300PCS 3:1 Heat Shrink Tubing Kit or 360PCS 3:1 Heat Shrink Tubing Kit, and apply controlled heat with the Mini Heat Gun 350W.

Crimping tool designed for heat shrink connectors, ratcheting mechanism, comfortable handles


The solder seal wire connector heat-shrink tube made of EVA materials clearly allows the user to see the quality of the soldering penetration, which is one of the qualities that verify a quality connector!
The 3:1 heat shrink connector with adhesive lined will exude hot melt adhesive after being evenly heated, quickly shrink, and adhesion to the insulation of the wire. Create a complete environmental seal. Waterproof,Wear-resistant.
Most items are usually shipped within 1-2 working days.
We do recommend allowing up to 3 weeks for your order in peak times, such as a special offer or promotion. Delivery times are beyond our control but rest assured give you the best service.
Your delivery confirmation email will contain your tracking number and order details.
Depending on the country of delivery, you may be required to pay extra tax or charges such as VAT and/or import duties.
We hope you love everything you purchase from Haisstronica but if you’re not 100% happy, we want to know about it. Please get in touch with all feedback about our products so we can continue improving our service for you.
You can return any item within 30 days of purchase. If you wish to return a product, you must notify Haisstronica within 7 days of receiving your item. Unfortunately due to logistics, we cannot accept return requests after this period.
All items being returned must be in new and resalable condition.
Refunds will be provided after the items have been received and inspected by Haisstronica. A 10% stocking fee will be deducted from the total amount.
Shipping charges are non-refundable.
Taxes and any other charges incurred by the customer are non-refundable.