32 Cell Seed Growing Trays Extra Strength, 10 Pack, Seedling Cell Planting Insert Plug Tray for Rockwool, Soil & Hydroponics by Bootstrap Farmer Ultra-Durable, High-Quality, BPA Free 32 Cell Tray. Made to last multiple seasons Propagation trays are NOT flimsy or brittle. Seedling tray with material won't crack or break Extra Strength Propagation 1020 Trays allow roots to grow through. Makes Great Germination Station Fits any standard 1020 Tray including Bootstrap Farmers Heavy Duty Trays. Great seedling tray Cell is 2" square by 2" deep. Outer Dimensions: 21.25" x 11.25" germination tray Have you seen a plug tray that can hold a bricks before without collapsing?<br> The Extra Thick Black Plastic can withstand heavy loads. <br> Won&#039;t break or warp while moving trays filled with wet material<br> Store trays when not in use without worrying about being crushed 21.25 Inches Long 11 Inches Wide 2 Inches Deep Vegetables Herbs Flowers Germination of Seedlings Soil Rockwool Vermiculite Perlite Many other Growing Materials