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Black single wall heat shrink tubing

3/4" Single Wall Heat Shrink Black

ST34-4

$2.01

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3/4" single wall heat shrink tubing in black. It has a 2:1 shrink ratio, so it recovers to about half its supplied 3/4" diameter. Flame-retardant polyolefin, rated -55°C to 125°C, shrinks at 90°C to 120°C. It insulates and protects against abrasion but does not seal out water.

Use it for: 2 AWG to 2/0 battery cable ends, lug barrels and wire bundles.

Getting the right size: it fits 2 AWG to 2/0 of our GPT primary wire and battery cable (wire or terminal OD 0.375"–0.625"). Not sure? See the heat shrink tubing size chart. Other black sizes: 1/16" · 3/32" · 1/8" · 3/16" · 1/4" · 3/8" · 1/2" · 1" · 1-1/2". Same size in white, red, clear, blue. Need a waterproof seal? Use 3/4" adhesive-lined dual wall.

Sold in 6 in and 4 ft pieces, plus a 330 ft spool. See all single wall heat shrink.

• Diameter: 3/4" (before shrinking)
• Shrink Ratio: 2:1 (shrinks to 50% of original diameter)
• Wire Gauge Range: 2 AWG-2/0 (our GPT primary wire / battery cable; fits 0.375"–0.625" OD)
• Material: Single-wall polyolefin
• Temperature Rating: -55°C to 125°C (-67°F to 257°F)
• Shrink Temperature: 90°C to 120°C (194°F to 248°F)
• Color: Black
• Waterproof: No
• Flame Retardant: Yes

• Wire Insulation & Repair - Restore damaged wire insulation, cover exposed conductors, and protect wire splices in electrical systems where basic insulation and abrasion protection are needed.

• Terminal & Connector Protection - Insulate crimp terminals, solder joints, and electrical connections to prevent shorts, corrosion, and accidental contact in automotive, marine, and industrial wiring.

• Cable Bundling & Organization - Bundle multiple wires together, create strain relief at connection points, and organize cable runs in control panels, equipment enclosures, and wiring harnesses.

• Wire Identification & Color Coding - Mark and identify circuits, phases, and wire functions using colored tubing for easy troubleshooting, maintenance, and compliance with electrical codes.

  • UL Listed
  • CSA Certified
  • Free Shipping on orders $50+
  • Orders placed before 3pm PST ship same day
  • 30-day no-hassle return
  • Buyer may be liable for return shipping charges

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