We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Clear flexible tube coil, 10 feet, 3/8in inner diameter, 1/2in outer diameter

PrimoChill

PrimoChill PrimoFlex LRT Tubing 3/8in ID 1/2in OD 10ft diy cooling

SKU CH-Q1C7-EQFDS

Flexible water-cooling tubing with 3/8in ID and 1/2in OD, 10ft length, made in the USA to ISO 9001:2015 standards

  • TypeCPU Block

Color Clear

  • Black
  • White
  • Clear

Struck-through versions exist but are not stocked here.

  • Trusted by elite builders for over 20 years
  • Manufactured in the USA under ISO 9001:2015 standards
  • Compatible with a broad range of closed-loop coolers
  • Includes System Prep and coolant for immediate use
  • Flexible design simplifies custom loop installation

Tubing for custom water-cooling loops

PrimoChill PrimoFlex LRT is flexible tubing made for DIY liquid-cooling builds. It ships as a 10-foot length with 3/8-inch inner diameter and 1/2-inch outer diameter. The tube is manufactured in the USA under ISO 9001:2015 standards and is bundled with system preparation fluid and coolant.

Check fitting compatibility before ordering

The tubing fits 3/8-inch compression fittings or 3/8-inch barbs with 1/2-inch clamps. Minor fit issues have been reported with strict-tolerance brands such as Bitspowr and Lamptron. Verify that your existing fittings match the stated inner and outer diameters.

Requires compatible fittings and loop components

The tubing connects CPU blocks, radiators, pumps and reservoirs in a custom loop. It frees builders from rigid tubing bends and works with a wide range of closed-loop coolers. Avoid alcohols, ethylene glycol and dyed coolants to prevent staining and warranty voids.

Highlights

  • Trusted by elite builders for over 20 years
  • Manufactured in the USA under ISO 9001:2015 standards
  • Compatible with a broad range of closed-loop coolers
  • Includes System Prep and coolant for immediate use
  • Flexible design simplifies custom loop installation

Specifications

TypeCPU Block

Questions about this item

Does the 10 ft PrimoFlex LRT tubing bundle include fittings or coolant, or must they be purchased separately?

The bundle includes System Prep and coolant; compression fittings or barbs and clamps for 3/8 in. ID × 1/2 in. OD tubing are not included and must be bought separately.

How do I choose between the 3/8 in. ID × 1/2 in. OD size and other diameters for my loop?

Match the tubing to your fittings — this size works with 3/8 in. compression fittings or 3/8 in. barbs with 1/2 in. clamps; other diameters require different fittings.

What does the ±.005 in. inner-diameter tolerance mean once the tubing is installed in a loop?

The tight tolerance keeps the bore consistent so 3/8 in. compression fittings seal reliably and flow stays steady through bends.

New to this? Which coin should you pay with — what to check, what it costs to pay, and what is never asked for.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.