Place the revolutionary Single-Use FloraCap on your 6 in Rockwool cubes and maximize your space in the vegetative cycle. It's vacuum form design blocks light while allowing air, water and nutrients to your plants. The FloraCap was designed with the vegetative state in mind but has proven a worthy tool for the avid top feeder throughout the flowering stage as well. Easy to automate with the 2 built in 1/4 in holes for receiving hose. Made from BPA and lead-free plastic, 100% recyclable.