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Three-foot solid silicone cord, 11.5mm diameter, for 12mm ID rigid tubing

PrimoChill

PrimoChill Rigid Tubing Bending Cord 11.5mm OD for 12mm ID

SKU CH-F49G-1TMVB

Solid silicone cord inserts into 12 mm ID rigid tubing to prevent collapse while heating and forming complex bends

  • TypeCPU Block
  • Tube Dim.12mm OD (For 12mm ID Tube)
  • Solid silicone insert prevents tube collapse during complex bends
  • 5 mm cord fits tightly inside 12 mm ID acrylic or PETG tubing
  • Durable material withstands repeated heating cycles for practice bends
  • Single 3-foot piece stretches to cover long tube runs
  • Tight fit reduces air pockets and flat spots on finished bends

Bending Cord for 12mm ID Tubing

The PrimoChill solid cord inserts into 12mm inner-diameter acrylic or PETG rigid tubing to prevent collapse during heat bending. It is intended for custom-loop builders who need clean, complex bends without surface cavities or flat spots forming on the tube exterior.

Check Tube Material and Fit Before Use

This insert only supports 12mm ID acrylic or PETG tubing; other materials or dimensions are not compatible. The cord must be stretched and lubricated for a tight fit, and the tube should be reamed first to ensure the insert slides in without excessive resistance.

Replaces Makeshift or Tubed Inserts

A solid cord gives tighter internal support than hollow or improvised alternatives, reducing kinks and air pockets on intricate bend patterns. The trade-off is that removal is more difficult and the cord cannot be stretched as far, so it suits builders who prioritise bend quality over convenience.

Highlights

  • Solid silicone insert prevents tube collapse during complex bends
  • 5 mm cord fits tightly inside 12 mm ID acrylic or PETG tubing
  • Durable material withstands repeated heating cycles for practice bends
  • Single 3-foot piece stretches to cover long tube runs
  • Tight fit reduces air pockets and flat spots on finished bends

Specifications

TypeCPU Block
Tube Dim.12mm OD (For 12mm ID Tube)

Questions about this item

Does the PrimoChill bending cord ship as a single piece or a kit, and is any lubricant or reamer included?

The package contains one solid silicone cord measuring three feet. No lubricant, reamer or additional tools are supplied; those must be sourced separately.

The cord is listed as 11.5 mm OD for 12 mm ID tubing — does that cover both acrylic and PETG, or only one material?

It is compatible with both acrylic and PETG rigid tubing that has a 12 mm inner diameter.

How does the 11.5 mm outer diameter of the cord translate to bend quality inside a heated 12 mm ID tube?

The tight 0.5 mm interference fit supports the tube wall during heating, reducing collapse, kinking and internal cavities on complex bends.

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