This hydroponic outdoor grow system is designed for fast, maximum-convenience vegetable gardening. Perfect for beginners! No experience needed.More nutritious and better-tasting than soil-gardened produce because oxygenated water and nutrients are delivered directly to the roots. Adopted food-grade PVC-U pipes,each pvc pipe diameter is 2.48”/63mm,hole size is 1.2”*1.2”/30mm*30mm with ample space for vegetables,flowers and plants.Suitable for lettuce,spinach,pakchoi,cabbage,radishes,strawberry,herbs,rape,beets,garlic seedlings,canola,celery,etc. The water pump with timer allows you to set the on time at 5/15/30 minutes intervals and off time at 30/60/120 minutes intervals to reach the nutrient film technique,The circulation mode can also be set manually or automatically according to demandmake, make the pump more durable,save nutrient solution and make the vegetables grow better! Extremely simple to assemble and use,only need nutrient solution(not include), no odor, very clean; It is easy to take care of, no arable land, clear weeds, save time and effort. Being close to nature, you can purify the air and make full use of space to keep the crops out of the soil.especially suitable for leafy vegetables in homes, gardens and offices,LAPOND provides a 1-year warranty on the Hydroponic Grow Kit and accessories.Please contact us if you want to add extra pieces.