• Diffuses oxygen efficiently and smoothly in your fish tank
• Size: 5/8" x 7/8" , suitable for Air Line Tubing 3/16"
• Durable and sturdy material. Safe and non-toxic to your fish
• Put out fine bubbles making it efficient in the replacement of Oxygen in aquariums, tanks
• Package Content: 1 air stone 

Available in 3 sizes:

• 5/8" x 7/8"
• 3/4" x 1.5"
• 3/4" x 2"