We introduced HydroGrow porous irrigation hose to American gardeners nearly 20 years ago. Now we've got a new design that's slimmer (1/2" diameter) and more flexible, so it's easier to weave around plants. We've also thickened the porous walls for slower and more uniform water distribution. HydroGrow waters a 2-ft wide band with as little as 8 lbs. of water pressure. Garden tested ??? increases yields over 50%! Simple to use: place on level ground and cover with soil or mulch End caps and fittings are pre-installed Length is one continuous roll of 50 ft. or 100 ft. Inside diameter of tubing is 1/2" Wall thickness is 1/8 " Uses 1/2" insert fittings For uniform water flow, we recommend adding a pressure regulator (not included) Gardener's Supply Exclusive