2PCs 16 Gallon Equivalent Air Pot Pruning Plant Container This container improves the root system and stops root circling. When roots reach the inward pointing cones, they are directed outwards (in a regular pot, they simply deflect to the side, which starts the vicious process of root circling). When they reach the holes at the end of the outwards pointing cones, the tips of the roots dry up. This tricks the plant into growing more roots. It is excellent for transplanting seedlings and cuttings. Plants can be kept for one to two seasons before transplanting into a larger pot or directly in the garden. Super fast shipping from USA ! No extra shipping charges to 48 continental US states (not include HI, AK, PR etc)