10-in Round Grow Lids - Dual-Sided White/Black - 5.5 mil - 40 Count

Light Control on Both Sides of One Cover - 40 Lids

Exposed growing surfaces let light in where it feeds algae and give pests a place to settle. These round lids cover the surface and put the right face up for your setup. The white face reflects light, and the black face blocks it. At 5.5 mil thick, they hold their shape as a covering layer.

One unit holds 40 round lids, enough to cover a full run of sites for a regular indoor grower, or to stock a larger room without reordering often. Hobby growers can use the extras for rotation and replacement.

Key Features & Benefits

• Dual-sided design — white face reflects light, black face blocks it, so one lid suits two needs.
• 5.5 mil thickness — a sturdy covering layer that handles repeated placement.
• Round shape — suits round openings and sites.
• 40 lids per unit — covers many sites from a single purchase.
• Light blocking — the black face helps limit algae and mildew conditions.

Who Should Use 10-in Round Grow Lids

Indoor growers, hydroponic operators and home gardeners who need to cover round sites, limit light on growing surfaces, or reflect light back toward plants will find these useful.

About 10-in Round Grow Lids

These are dual-sided round covers with a white face and a black face, 5.5 mil thick. Each lid measures about 11.5 x 11.5 in, and the unit weighs 0.8 lb. Each unit contains 40 lids.

Frequently Asked Questions

Q: Which side should face up?
A: Put the white face up to reflect light. Put the black face up to block light. Choose based on what you need at that site.

Q: How many lids come in one unit?
A: One unit contains 40 round lids. The unit is sold each.

Q: How thick are these lids?
A: They are 5.5 mil thick. Mil means one thousandth of an inch.

Q: Do they help with algae?
A: The black face blocks light, and light is what algae need to grow. Blocking it helps limit algae and mildew conditions.

Q: What size are the lids?
A: They are sold as 10-in round lids. The measured product dimensions are 11.5 x 11.5 in with a height of 0.3 in.