MB 15 X-0.8 - 1.2mm MIG LINER

Description: MB 15 MIG Liner (0.8mm - 1.2mm)
This is a consumable replacement part that fits inside the MIG torch cable (from the Euro connector to the swan neck). Its sole function is to provide a smooth, low-friction, and correctly-sized channel for the welding wire to travel from the welder's wire feed unit to the contact tip.

Key Specifications
Torch Compatibility: MB 15 (also known as 15AK)

Material: Steel (a tightly wound spiral, often with a thin plastic coating)

Common Color Code: Red

Intended Wire Diameter: 1.0 mm to 1.2 mm (0.040" - 0.045")

Compatible Wire Types: "Hard" wires, such as:

Mild Steel (ER70S-6)

Stainless Steel

Steel-based Flux-Cored (FCAW)

Important Note on Sizing (0.8mm vs. 1.2mm)
You specified a range of 0.8 mm−1.2 mm. It is critical to know that MIG liners are typically split into two common sizes in this range:

Blue Liner (for 0.6 mm−0.9 mm wire): This is the correct liner to use if you are primarily running 0.8 mm (0.030") wire. It provides a tighter, more stable feed.

Red Liner (for 1.0 mm−1.2 mm wire): This is the liner you described. It is the correct choice for 1.0 mm (0.040") and 1.2 mm (0.045") wire.

While you can run 0.8 mm wire through a larger Red (1.2 mm) liner, it is not recommended. The excessive "slop" or clearance can cause the wire to "chatter" inside the liner, leading to an unstable arc and feeding problems (like bird-nesting) at the drive rollers.

Rule of thumb: Always use the smallest liner that your wire will fit through smoothly.

Important Note on Wire Material (Steel vs. Aluminum)
This steel liner is only for hard wires.

For Aluminum (or other soft wires): You MUST use a Teflon (PTFE) Liner. A steel liner will shave and jam soft aluminum wire, causing immediate and constant feeding problems.

Length
Just like your torch, these liners are sold in lengths to match:

3 meters

4 meters

5 meters

When you buy a replacement liner, it will be slightly longer than the torch (e.g., a 3.5m liner for a 3m torch). You must trim the liner to the exact correct length during installation.