Material: High quality PP plastic rooting ball, sturdy propagation shells are strong enough to be reused for years. Our package contains 3 variants (S, M, L) to cultivate different sizes of plant roots. The diameter of the root balls follows as, Small 5cm, Medium 8cm, Large 12cm. Safety Lock: Plant rooting ball features four caps and corner locks that interlock. This plant rooter box ensures the branch to hold the propagator in place. However, you can use plastic ties to hold the shells securely. Easy to Use: At the position where rooting is needed, peel off the bark to a width of about 2-2.5cm. Put moist moss or garden soil into the root growing area of the plant. Wrap the root growing area of the plant filled with moist moss or garden soil around the stripped bark. Normally, you can see the propagation results within 6-8 weeks after installation. No Harm: The plant propagation air layer pods are safe for the mother plant and will not cause any harm, because only a small branch on