Treegator Portable Drip Irrigation System - You've seen these in professional landscapes around your neighborhood, now you can care for your trees as the pro's do! Reduce plant shock; perfect for soaking trees before digging; adjustable water flow rates; eliminates evaporation and run-off. Reduces watering up to 50% by eliminating run-off and evaporation. 12 mil nylon-reinforced, UV-treated polyethylene, with a 20 gal. capacity. One Treegator fits trees up to 351 caliper - zip two or three together to water up to 1251 caliper trees!