Check the listing for details. EcoPlus Hydrovescent Air Disc, 6". Color: Black, Condition: New. Listed at 30.99 USD. EcoPlus Hydrovescent Air Disc, 6" Features EcoPlus Hydrovescent Air Disc air diffusers are great for aerating or circulating nutrients in your tanks or reservoirsThe 3 air diffusers have a built-in 3/8 inch 90 degree elbow fitting that insures the airline connects freely to your fitting and prevents the air line from kinking at the base of the fittingBrand: EcoPlusItem Weight: 1.7 lbs Fast and Free Shipping You're already purchasing the item. Why pay additional for shipping, especially slow shipping? We get your order shipped out within 1-business day and delivered to your doorstep as quickly as possible. Competitive Pricing With our dynamic pricing model, our prices are always competitive. Our prices are some of the lowest that you will find on the internet. Rest assured that you're getting a good deal when purchasing with us. 30-day Money Back Guarantee We are committed to making sure that you leave this transaction satisfied. If you're unhappy with the product for any reason, you may return it back for your money-back or a replacement within 30 days. No questions asked!