Envanptaz Weed Eater Replacement Head for Echo SRM Trimmers, 5-Pack Speed Feed 400, Heavy-Duty

Envanptaz 5-pack replacement Speed Feed 400 trimmer heads are direct-fit, heavy-duty spool heads designed for Echo SRM straight-shaft trimmers to restore fast, reliable line feeding and prolonged work between service intervals.

If your Echo or compatible Shindaiwa straight-shaft trimmer is slowing down because of a worn-out head, this set gives you five robust replacements built for high RPM mowing and rough yard conditions. Each head is injection-molded from impact-resistant plastic to withstand knocks, and the Speed Feed-style spool lets you advance line quickly without disassembling the head. These units are intended for straight-shaft SRM models (not curved shaft) and do not include adapters, so confirm model compatibility before ordering.

Which trimmer models work with this replacement head?

The Envanptaz Speed Feed 400 head fits many Echo SRM straight-shaft trimmers and several Shindaiwa equivalents. It replaces several OEM part numbers and is suitable for a wide spectrum of PAS and SRM variants used in residential and light commercial landscaping.

• Compatible Echo SRM models: SRM-210, SRM-225, SRM-230, SRM-250, SRM-265, SRM-266(S), SRM-280, SRM-2100, SRM-2400, etc.
• Also fits Shindaiwa part numbers 99944200907 and 99944200902 and replaces 78890-30000, 78890-11000, 78890-18001, 78890-18000.
• Works with PAS/PAS series trimmers and many common commercial trimmer head types listed in the product features.

How durable and reliable are these replacement heads?

Each head is constructed from sturdy, impact-resistant plastic formulated to resist cracking and wear from regular use. They are rated to perform at high rotational speeds, providing reliable operation when cutting through thick grass and weed clumps.

• Impact-resistant molded housing reduces breakage on contact with rocks or rough terrain.
• Designed for continuous operation up to the head's rated RPM for consistent line delivery.
• Five heads in the pack provide spare units to reduce downtime and maintenance trips.

What does the Speed Feed design mean for everyday use?

The Speed Feed-style spool lets you advance trimmer line instantly by tapping the head while the shaft spins, avoiding disassembly and saving time on the job. This makes mid-job line changes faster and keeps you mowing instead of repairing.

• Quick bump-feed action dispenses fresh line without stopping or opening the head.
• Spool accepts common trimmer line sizes used in Echo-compatible heads.
• Ideal for frequent line top-ups in heavy growth or uneven terrain situations.

Will these heads require special adapters or fit curved-shaft trimmers?

These replacement heads are made specifically for straight-shaft Echo SRM models and do not include adapters; they are not compatible with curved-shaft trimmers. If your trimmer uses an adapter or a different shaft style, check your model details before purchasing.

• No adapters included—verify your trimmer uses a direct-mount straight shaft interface.
• Not suitable for curved-shaft or specialty shaft trimmer models.
• Measure your existing head or consult your owner's manual to confirm fitment.

Who is this for: Landscapers, contractors, and homeowners who use Echo or compatible straight-shaft trimmers and need an economical bulk supply of reliable replacement heads. This five-pack keeps backup spools on hand for longer seasons, reduces downtime during maintenance, and provides a cost-effective way to restore a trimmer’s bump-feed performance without buying OEM parts. If you need parts for curved-shaft tools or require adapter hardware, consider model-specific heads or adapter kits instead.