About this item Wenshall’s air stone set is perfect for aquariums and hydroponics systems, providing essential oxygen to your plants and fish. Our set includes 4 pcs 1.6 inch air stones and 2 T-Splitters, so you can easily set up your system without any additional purchases. Made of high-quality silicon carbide, our air stones are safe for your fish and plants, promoting growth and a thriving environment. Soak the air stones in water for an hour before use and brush the surface every 2 weeks for optimal performance and longevity. dimension: 1.6″ D x 0.6″ H; Jetting volume: 2 L/min; Standard ID airline tubing: 3/16″. Driven by even nano air pumps of 2 W – 4 W.