about this project Size: There are three sizes in total, S/M/L. S: 5cm in diameter, high-voltage branch size: 3-9mm; M: 8cm in diameter, high-voltage branch size: 7-12mm; L: 12cm in diameter, high-voltage branch size: 12-31mm. FAST GROWTH RESULTS: This specially designed plant rooting device can help your cuttings get stronger roots , propagating more mature plants faster than traditional propagation methods. It allows you to see propagation results within 6-8 weeks of installation. SAFE LOCK: Uses the ancient method of air layering, rooting branches to replicate existing plants and produce new ones. The automatic buckle is more convenient and the disassembly is more flexible. Reusable: Propagation trays are durable and can be used over and over again, so you can clone as many plants as you want . Attach and clone existing plants hassle-free. No harm: It will not cause any harm to the mother plant, because only a small branch is used on the plant you want to clone, so there is no or only slight disturbance, and it does not affect the natural growth of the plant.