STIHL uses a custom blend of polymers to provide a line with the best all around characteristics of abrasion resistance, flexibility over time and temperature ranges, and welding resistance.

Colour-coded by size:

• Blue - .065 (1.7mm)
• Green - .080 (2.0mm)
• Orange - .095 (2.4mm)
• Red - .105 (2.7mm)
• Black - .130 (3.3mm)
• .095 - 1 lb Fits models: FS55, 56, 90, 100RX, 110, 250