?? This item is Flexible and you can bend to any shape required. It's suitable for use as decoration and oxygen supply in all tanks and aquariums.

Features:
Flexible and can bend to any shape required.
Bubbles dispense equally along the soft tube.
Suitable for use as decoration and oxygen supply in all tanks and aquariums.
Fits for standard 4mm air tube.
Provides better water movement and aeration for your aquarium.

Specifications:
Color: Black
Material: Rubber + Plastic
Item Length: 45cm / 17.7in
Item Weight: 50g / 1.76oz
Package Size: 25.5 * 9.5 * 1.5cm / 10 * 3.74 * 0.6in (L * W * H)
Package Weight: 75g / 2.67oz

Package List:
1 * 45cm Air Curtain Tube