Uniflasy 19.5in Grill Grates for Weber Genesis 300 Series - Heavy-Duty

In this review the Uniflasy 19.5in grill grates are judged as a budget-friendly, heavy-duty replacement for older Weber Genesis 300 series grills. The bottom line: these cast iron grates fit the Genesis E-310/E-320/E-330 and S/EP 300 models and deliver strong heat retention and searing performance, making them a practical choice for owners who need a durable cooking surface without paying dealer prices. The review focuses on fit, material quality, and everyday cooking performance.

Key Features

• Exact fit: Designed to replace Weber Genesis 300 series grates, these fit models like E-310, E-320, E-330 and compatible S and EP variants for a straightforward swap.
• Durable cast iron: Made from solid matte enamel cast iron for strength and a heavy feel, which helps resist bending and delivers long-term service when maintained.
• High heat retention: The cast iron construction holds heat well, producing strong sear marks and even cooking across the surface for steaks, seafood, and vegetables.
• Exact dimensions: Each grate measures 19.5in x 12.9in x 0.5in so the pair covers the full cooking area expected for Genesis 300 series units.
• Economical replacement: These grates replace Weber part numbers 7524 and 7528, offering a lower-cost alternative to OEM parts while maintaining core performance.

Who It's For

These grates are best for owners of Weber Genesis 300 series grills made between 2007 and 2016 who need a direct-fit replacement that restores searing capability and surface heat retention. Grillers who prioritize strong sear marks and a sturdy, long-lasting cooking surface will appreciate the cast iron construction and the measured dimensions that match their original grates.

Customers who have newer Genesis II 300 or Genesis II LX 300 models should look elsewhere, as these grates do not fit those series. Also, buyers who want a maintenance-free porcelain surface may prefer a different finish, since cast iron benefits from regular oiling and care to prevent rust.

Pros & Cons

Pros

• Solid cast iron build delivers excellent heat retention and professional sear marks.
• Direct compatibility with many Genesis 300 models makes installation simple and reliable.
• Measured sizing and matte enamel finish provide an economical replacement for OEM parts 7524 and 7528.
• Relatively easy to clean and maintain when oiled and cared for after use.

Cons

• Cast iron requires routine oiling and proper storage to avoid rust, and some users report corrosion within a year if not maintained.
• Not compatible with Genesis II 300 or Genesis II LX 300 series, so fit must be confirmed before purchase.

Specifications

Brand	Uniflasy
Fit	Weber Genesis 300 Series (E-310/E-320/E-330, S-/EP-310/320/330)
Material	Matte enamel cast iron
Each grate size	19.5in x 12.9in x 0.5in
Set size (two grates)	19.5in x 25.8in
Replaces part numbers	Weber 7524, 7528

Our Verdict

For anyone with a compatible Genesis 300 grill seeking stronger searing and a robust cooking surface at a lower cost than dealer parts, these Uniflasy cast iron grates are a sensible buy. They deliver the heat retention and build quality expected from cast iron, but buyers should commit to regular oiling and care to prevent rust and maximize lifespan.

Frequently Asked Questions

Do these grates fit my Genesis 300 model?
They are designed for Genesis 300 series models including E-310, E-320, E-330 and S/EP 310-330 produced around 2007-2016; they do not fit Genesis II 300 or Genesis II LX 300.

What maintenance do cast iron grates need?
Oiling before and after use and thorough drying after cleaning helps prevent rust and preserves the matte enamel finish.

Are these OEM parts?
They replace Weber part numbers 7524 and 7528 as a compatible aftermarket alternative that restores function at a lower price.