100m 4mm Aquarium Fish Tank Soft Silicone Air Hose Tubing for Air Pump Specifications: Color: transparent Material: silica gel Dimensions: inner diameter 4mm, outer diameter 6mm, total length about 100m Purpose: oxygen hose for aquarium and fish tank Suit: about 100m / roll Silicone soft air tubing is the perfect product when an air device is required for your aquarium. It is ideal for using with air stones, air-actuated ornaments and air-driven filters. Package: 100 meter air tubing/roll 4mm