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Haisstronica 3/32" red dual-wall heat shrink tubing, 90 feet, 3:1 ratio, built for high-temperature environments.
Haisstronica 3/32" black heat shrink tubing, 90 feet, 3:1 ratio, flame-retardant, adhesive-lined for industrial durability.

3/32 Inch Heat Shrink Tubing Roll

$27.99 USD

Keep small-wire insulation within easy reach.
Stock a continuous supply for smaller compatible wiring repairs.
• Small-diameter option — check the expanded and recovered fit against your wire.
• 90ft roll supply — cut the length needed for each compatible repair.
• Insulating inner seal — correctly applied heat activates the adhesive lining around.

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Haisstronica model automatic cable stripper for precision tasks.
Self-Adjusting Wire Stripper AWG 24-10 $23.99
Workbench scene using heat gun wire connectors; precise heating shrinks sleeves on cables for sealed connections.
350W Mini Heat Gun $23.99

3/32 Inch Heat Shrink Tubing Roll provides 90FT of 3:1 dual-wall tubing with a 3/32-inch (2.4 mm) starting diameter. It recovers to approximately 0.8 mm, making it suitable for fine-wire insulation, solder-joint protection, small sensor leads and compact wire-harness organization when the covered component fits the diameter range.

3/32-Inch Tubing Specifications
  • Length: 90FT
  • Shrink ratio: 3:1
  • Starting diameter: 3/32 inch (2.4 mm)
  • Recovered diameter: Approximately 0.8 mm
  • Construction: Dual-wall tubing
Specification table for wire crimper and stripper tool sizes

❓What does the 3:1 shrink ratio mean?

The tubing can recover to about one-third of its supplied diameter when heated correctly. This 7.9mm size has a specified fully recovered inner diameter of no more than 2.7mm.

❓How do I choose the correct tubing diameter?

The expanded size must clear the largest component, while the recovered size must seal tightly around the smallest section. Do not choose by wire gauge alone.

❓Can I shrink the tubing with an open flame?

Use a controlled heat gun. An open flame can scorch the sleeve, damage nearby insulation, and create an uneven adhesive seal.

❓How to Choose

Measure the largest diameter the tubing must slide over and the smallest diameter it must seal after heating. Confirm the supplied inner diameter of at least 7.9mm clears the connection and the recovered inner diameter of no more than 2.7mm will seal the finished joint. Select color by the project identification standard rather than by wire gauge alone.

❓How to Use

  1. Disconnect power, cut the required tubing length, and slide it over the cable before completing the connection.
  2. Center the tubing over the finished joint with sufficient overlap on both sides.
  3. Apply controlled heat evenly from the center outward while keeping the heat source moving.
  4. Stop heating after the tubing has fully recovered and the adhesive has formed an even seal.
  5. Allow the joint to cool before bending, pulling, testing, or restoring power.
  • Enjoy free shipping on all orders.
  • Delivery Time: 1-2 business days to The US and Canada. Delivery times may vary depending on your location and carrier conditions.
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  • Tracking: After your order is shipped, you will receive an email with a tracking number to monitor the delivery status.
  • Need Help? Contact our support team for assistance with shipping or your order.
  • 30-Day Returns
    You may request a return within 30 calendar days of delivery. Items must be unused, in their original condition, and include all original packaging and accessories.
  • Damaged, Defective, or Incorrect Items
    Contact us with your order number and photos. If the issue is due to our error, we will cover reasonable return shipping costs or provide an appropriate replacement.
  • Refunds
    Approved refunds are issued to your original payment method within 5 business days after inspection. Your bank may require additional processing time.
  • To start a return, email support@haisstronica.com with your order number and reason for return. Please obtain approval before sending anything back.
  • View Full Return & Refund Policy
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Learn More About Porduct

  • Good Sealing:Our heat shrink tubing provides a tight and secure seal to protect your wires and cables from water, dust and other contaminants
  • Easy to Cut and Install:With its 3:1 shrink ratio, this heat shrink tubing shrinks to 1/3 of its original diameter, making it easy to fit a variety of wire sizes
  • Waterproof:The adhesive lining in heat shrink tubing creates a watertight seal as it cools, providing excellent protection against water, moisture and corrosion
  • Wider Application: Heat shrink tubing is used for marine and automotive wiring, wire connections and DIY electrical wiring projects. For all your needs

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