Envanptaz Speed Feed 400 Trimmer Head Replacement — 5-Pack for Echo SRM Straight-Shaft, Impact-Resistant

Replacement Speed Feed 400 trimmer heads by Envanptaz — a five-piece set built to restore cutting power on Echo SRM straight-shaft string trimmers.

If your Echo or compatible straight-shaft trimmer has a worn, cracked, or unreliable trimmer head, this five-pack from Envanptaz gives you immediate, affordable replacements. Each head is molded from impact-resistant plastic, rated for high rotations, and designed to snap into the Speed Feed 400 style feed system to minimize downtime and maintain consistent cutting performance across lawns, overgrown edges, and weed patches.

Will these heads fit my Echo SRM trimmer?

These trimmer heads are made for Echo straight-shaft SRM models and many equivalent parts from other makers. They are not intended for curved-shaft trimmers and adapters are not included.

• Compatible Echo SRM models: SRM 200, 210, 225, 230, 2400, 265, 280, 2100, and similar SRM series.
• Also fits many Shindaiwa and manufacturer part numbers (e.g., 99944200907, 78890-30000).
• Not compatible with curved-shaft trimmers; check your model before ordering.

How durable and reliable are these replacement trimmer heads?

Each head is constructed from sturdy, impact-resistant plastic designed to resist cracking from normal use and accidental impacts. They are designed to handle high rotational speeds so you can rely on steady operation during typical trimming tasks.

• High-impact plastic construction reduces breakage and wear.
• Rated for up to 10,000 RPM maximum rotation for continuous use.
• Sold as a set of five to replace multiple worn heads or keep spares on hand.

Do these heads improve line feeding and cutting performance?

These Speed Feed 400-style heads are engineered to deliver consistent line deployment and a clean cut when used with the correct trimmer lines. They restore the original feed feel and can make trimming faster and more predictable than a damaged head.

• Designed for quick line extension and even feed under normal load.
• Works well for edging, clearing grass, and cutting through dense weed clumps.
• Replacement of worn heads eliminates wobble and uneven cutting patterns.

What should I know before installing these replacement heads?

Installation is straightforward on compatible straight-shaft SRM models but requires the trimmer’s existing drive interface; adapters are not supplied. Always disconnect power and follow your trimmer’s manual when removing the old head and installing the new one.

• No adapter included — install directly on compatible straight-shaft Echo SRM models.
• Follow safety steps: disconnect spark plug or battery prior to work.
• Keep one or two heads as spares for busy seasons or professional use.

Who is this for: Landscapers, homeowners, and property managers who use Echo straight-shaft SRM trimmers and need a cost-effective way to replace multiple worn speed-feed heads will benefit most. The five-pack format suits users who maintain several machines or want to keep spare heads on hand to avoid interruptions during mowing and trimming sessions. If you require a trimmer head for a curved-shaft model or need specific adapter hardware, check compatibility before purchasing.