Watts SVBKI10 Pre-Cut 5/8-Inch Diameter Black Vinyl Tubing, 10-Foot Length Pre-cut black vinyl tubing 5/8-Inch OD x 1/2-Inch ID x 10 foot length This black PVC tubing in UV and ozone resistant which makes it a superior choice for cooler supply lines and protective insulation in water gardens Safe for fish tanks Not for use with ice makers