Connects pump, bio-filters, UV clarifiers, waterfalls, and other water features. Flexible and kink-resistant. UV resistant, Smoke color - makes it easy to hide, restricts sunlight thus reduces algae growth inside tubing. Rolls packed in dispenser box. 1/2" ID x 100 ft. 5/8" ID x 100 ft. 3/4" ID x 50 ft. 1" ID x 50 ft. 1.25" ID x 50 ft.