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.