Silicone Airline 20 Foot (6m) Flexible Pond or Aquarium Tubing ? 20 Foot (6m) of 3/16th 4mm airline that fits all popular Airpumps and fittings. Flexible silicone tubing that stays soft and flexible without kinking. High quality silicone tubing that does not crack or become brittle over time like regular tubing. Ideal for use with air stones, air actuated ornaments, Bubble Wands, Powerheads and air driven filters. ? Product suitable for use in Ponds, Fresh Marine Aquariums and Fish Tanks. ? Aquarium, Pond Fish and Plant Safe ? Helps improve aeration in Fresh Water and Marine Aquariums and Fish Tanks ? Fits all Standard Aquarium Airpumps and Airline Tubing Terms and Conditions. We use all approved methods for accepting payment. Sales Tax will be added to all shipments based regulations. We always try to combine purchases, please contact us directly for a personal service. You will be notified on the day that your goods have been dispatched via e-mail with tracking which is used on all purchases. Please note that if there are any problems, contact us first via e-mail giving full details of any problem along with your user ID. We use USPS and UPS as our chosen carriers shipments to Hawaii, Alaska Puerto Rico may incur surcharges, contact will be made to advise before shipment at which point the order can be canceled if desired. Orders placed on Saturday/Sunday Public Holidays will be processed next working day. We pride ourselves on excellent feedback, if any part of the buying experience is not to your satisfaction, please contact us to rectify before leaving feedback. By committing to buy you are agreeing to the Terms Conditions stated above.