YXQ aquarium bubble air stone best for Fish Tank, Aquarium,creates bubbles in fish tank while attached to an air pump,used to increase the dissolved O2 level in the aquarium.

Shaped :16" Bar Design
Material : Mineral, Plastic;
Color : Green & Blue
Weight: 206g
Outlet Connector Diameter: 6mm/0.24" (Maximum)
Stone Length : 40cm/15.7"
Package Content: 2 x Aquarium Air Stone
Total Size (Approx.) : 41.4 x 2 x 1.3cm/16.2" x 0.8" x 0.5" (L x W x T)
Package Content: 2 x Aquarium Air Stone

Note:soak in water for 1 hour before use.