AutoPot Black Tubing, 1/2 Inch (ID) x 100 FeetAutopot Tubing for all of your hydroponic hardware needs. There are several sizes and lengths so make sure to select the dimensions that you will need for the fittings you have in your hydroponic system Available sizes: 1 2 Inch (ID) x 10 Ft. (1 2 ID, 3 4 OD) 1 2 Inch (ID) x 50 Ft. (1 2 ID, 3 4 OD) 1 2 Inch (ID) x 100 Ft. (1 2 ID, 3 4 OD) 1 4 Inch (OD) x 100 Ft. (1 8 ID, 1 4 OD) Choose 1 4" for AQUAvalve4 with 1 4" Fittings 3 8 Inch (OD) x 164 Ft. (1