5Pcs Aquarium Check for One Way Non-Return for Acc
Features: brand new and
To prevent water backflow to damage the front end of the pump or other products and equipment.
After the addition of the stop for the pump can be placed above or the of the water to prevent the risk of water backflow when the pump is shut
Each outlet needs to connect a stop for two-headed pump needs two stop valves, and so on.
Note: Please be sure to connect the end with "OUT" to the end near the air stone.
Package Content: one-way check valves.

Specifications:
Length: Approx. 36mm/1.42inch
Short Diameter: Approx. 20mm/0.79inch
Caliber: Approx. 4mm/0.16inch

Package Includes: Check Valves

note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order.
2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.