Unique Bargains 2pcs Aquarium Airstones Diffuser, 2 Check Valves, 2 Airline, 4 Connectors

Package Content:
2 x T-connector
2 x Straight Connector
2 x Air Atones
2 x Check Valves
1 x Oxygen Tube
Specifications:
Air Stone
Suitable for inner diameter 3/16"(4mm) soft tube.
Size: approx. 0.98 x 0.6" (25 x15mm)  
Net Weight: 12g
Check Valves
To prevent water backflow from airline.
T-connector
Allows you to combine two inputs to create one output and is excellent for use with dual outlet pumps.
Straight Connector
Allows you to combine two Pieces oxygen tube into one pieces.
3.3 Feet/1 Meter Aquarium Airline Tubing