Sejaede Trimmer Head Replacement 5-Pack for Stihl FS Series — Left-Hand Thread, Multi-Line Capacity

Sejaede's 5-pack trimmer head replaces Stihl part numbers 4002 710 2108 and 4002 710 2191 to restore cutting performance across many FS and KM series string trimmers.

These replacement trimmer heads give a cost-effective way to refresh worn bump heads on compatible Stihl models. Built for a range of line diameters and a standard left-hand threaded arbor, each unit is engineered to fit multiple machine years and configurations so you can get back to trimming quickly without hunting down hard-to-find OEM parts.

Which Stihl models will this trimmer head fit?

This 5-pack is designed to match numerous Stihl FS and KM series models spanning different production years. Fitment covers many popular consumer and professional trimmers, including FS55, FS80, FS90, FS110, FS120, FS130 and several KM/FR machines listed by model.

• Compatible with FS44, FS55, FS56, FS70, FS80, FS83, FS85, FS90, FS91, FS94, FS100–FS131 series.
• Also fits FR and KM combi-shaft machines such as KM55, KM85, KM110 and KM130.
• Works on many models produced across multiple years; check your owner's manual for arbor thread and size details.

How does the head handle different line sizes and installation?

The head features a split spool design that accepts three common line diameters, so you can choose thicker line for heavy growth or thinner line for fine edging. Installation uses a universal 10 mm x 1.0 mm left-hand thread arbor—standard on many Stihl units—so replacement is straightforward for anyone familiar with trimmer maintenance.

• Accepts 0.080" (2.0 mm), 0.095" (2.4 mm), and 0.105" (2.7 mm) trimmer line.
• 10 mm x 1.0 mm left-hand thread arbor fits common Stihl bump-head spindles.
• Split design makes reloading line faster and reduces downtime in the yard.

What durability and quality features should I expect?

Sejaede manufactures these heads with reinforced components to resist wear from frequent use and debris. Each unit undergoes inspection before shipment to ensure consistent build quality and reliable fit, helping avoid premature failures that interrupt tasks.

• Constructed from durable materials chosen for abrasion and impact resistance.
• Quality-checked prior to dispatch to reduce defects and returns.
• Pack of five offers spare parts on hand to minimize service interruptions.

Why choose this aftermarket option over OEM replacement?

This aftermarket pack balances cost savings with broad compatibility, making it a practical choice when OEM prices or availability are an issue. The multi-line capacity and robust design deliver flexible performance for homeowners and light pros without sacrificing fit or function.

• Lower per-unit cost than many OEM replacement heads.
• Five heads per pack ensure you have extras for seasonal workloads.
• Designed to meet or exceed expected durability for regular trimming tasks.

Who is this for: This 5-pack is aimed at homeowners, landscaping contractors, and equipment technicians who need reliable, affordable replacement trimmer heads for a wide range of Stihl FS and KM machines. If you maintain multiple trimmers, perform frequent edging or clear heavy grass and weeds, or simply want to keep spare parts handy, these heads provide versatile, ready-to-install options that restore cutting capability quickly.