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) for growing different sizes of plant roots. The diameter of root balls are as follows: Small 5cm, Medium 8cm, Large 12cm. Safety Lock: Plant rooting ball has four plugs and corner locks that interlock. This plant rooter box secures the branch to hold the propagator in place. Plastic ties can be used to further secure the shells. Easy to use: At the position where rooting is needed, peel off the bark at a width of about 2–2.5cm. Place damp moss or garden soil in the root growing area of the plant. Wrap the plant's root growth area filled with damp moss or garden soil around the stripped bark. Normally, you can see propagation results within 6–8 weeks after installation. No Damage: Plant propagation air layer pods are harmless to the parent plant and will not cause any harm, as only a small branch on the mother plant is used for rooting. The new plant grows while attached to the mother plant, so separation after rooting does not affect the parent. Compared with other plant propagation techniques, the success rate is higher. Wide applications: Plant root growing boxes use the air layering method, which encourages roots to grow directly on the branches, producing a more mature plant faster than standard propagation methods. Suitable for indoor and outdoor trees, such as roses, fruit trees, and hard-to-root species like magnolias and camellias.