Irrigation - Distribution Pipe Quarter Inch
1/4 in. x 100 ft. Vinyl Micro Drip Tubing - DIG
http://www.homedepot.com/p/DIG-1-4-in-x-100-ft-Vinyl-Micro-Drip-Tubing-B38100/100212036 $6.97 for 100 feet
http://www.homedepot.com/p/Rain-Bird-1-4-in-x-250-ft-Tubing-T22-250/202262499 $14.98 for 25 feet
1/4 in. x 500 ft. Micro Drip Tubing
http://www.homedepot.com/p/DIG-1-4-in-x-500-ft-Micro-Drip-Tubing-B38500/100142288
$21.48 for 500 feet