Johnny's Polypro Endurance trays are designed to be stronger, heavier and more durable than any other tray we offer. The Polypro Endurance Shallow Speed Tray excels in all shallow tray applications, and it also includes guide "bumpers" along the bottom edges to add reinforcement and assist in aligning soil blockers. Whether using Johnny's handheld or commercial soil blocker models, these trays make it easier and faster to center and align blocks in 1020 trays speeding up production efficiency. While these trays are a perfect complement to Johnny's soil blocker product line, the thicker walls and more durable design makes them a preferred option for larger scale farms. Each tray weighs 1.16 lb.