Oxy Certs by Hydrofarm

Pack of 20-Black

.8oz/ 1.75 Diameter/ .7” Depth

• Pre - Cut Stem Relief Hole
• Softest Material Available 
• Easy On Your Cuttings
• Writable Surface
• Does Not Soak Up Water
• Perfect For 2” Net Pots
• Non Toxic (Lab Tested)
• Chemical & Heat Resistant