Drip Hose - 1/2" (.610 ID X .720 OD) Polyethylene tubing sized .620 inside diameter by .710 outside diameter. Polyethylene tubing is recommended for use in installing a drip system. It's easy to punch for emitter installation and easy to repair.  it is resistant to UV light so it can be laid on the surface exposed to the sun. Easily coiled and stored from year to year. Most hose has lasted up to 10 years above ground.  Available "by the foot" or in rolls of 100, 500, or 1000 feet. (An additional $8.50 has been added to the price of 500 foot and 1000 foot rolls to cover additional freight charges.)