6 Pack Polymer Plastic Channel Drain Grate-19.7x7.9x1 in Durable Trench Cover...

Besides, it has higher toughness.Durable and sturdy enough. Can be used for years. PRODUCT SPECIFICATION: 19.7x7.9x1 in. It can be placed next to the fence in your yard to protect it from water corrosion.

eBay