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Blocker Plates

GrassFlap provides two options for your mower's blocker plate: Steel and Poly. Each material comes with its own set of pros and cons. The blocker plate is essential as it covers the discharge opening of the mower to prevent grass clippings from being scattered.


The steel blocker plate has the advantage of being formable either at the factory or during installation without the need for heat, and it sustains less damage if it comes into contact with the mower blade. However, it is harder to modify during installation, more costly to replace, and more challenging to repair if bent.

On the other hand, the poly blocker plate is lightweight and can be easily shaped using standard woodworking tools. Its flexibility means it's less prone to permanent deformation from minor impacts. The downside is that it is more susceptible to damage if it collides with the mower blade, although it is cheaper to replace than its steel counterpart.

In summary, when choosing between steel and poly for your mower's blocker plate, consider the balance between durability and ease of modification, as well as the cost of potential replacements.

Summer Shutdown 2024

Summer Shutdown 2024

Starting Friday, July 5th, GrassFlap will be shutdown and will resume all regular business on Monday, July 15th.

During this time, we will not be responding to any phone calls, voicemails or emails. All orders placed during this time will ship the following week.  All emails, phone calls & voicemails will be responded to in the order they were received.

Please take the time now to plan ahead for this shutdown. 

PLEASE NOTE: Any orders received before NOON EST on Thursday, July 4th will be sent out before the shutdown. All orders received after will be shipped out the week of July 15th.

Having trouble finding the GrassFlap for your mower? Use the product finder below to look it up.

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Don't see your make and model?

Please email David@grassflap.com with the following information: mower brand, type, deck size, name, model year and a few photos of your foot deck and discharge opening.

We will get back to you to answer your questions and, if needed, to help you select a unit for your mower.

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