Dripcap Product Details : SKU#520001 Specifications : Specification: 1. Size:4*4*4inch 2. Material:BPA and lead-free plastic 3. Color:Green 4. Four three-way stakes on the bottom for extra stability. 5. Holes in all four corners for leftover water drainage. 6. Stackable.Reusable. Works GREAT on...
http://www.hpsgrowlights.net/germination-accessories/dripcap/rockwool-dripcap.html