Widely use to Open hole connection for inlet and outlet pipes of Fish Tanks, water tanks, buckets Crafted from PVC, clear thread, easy to use Suitable for the connection of bottom and lower water pipes of Fish Tanks. Used to connection the water pipes of both sides and the aquarium from leaking 4 Different sizes for you to choose Small size, and easy to use, long life service, not easy to damage, and you can use for a long time, Manufacturer: HUAJINGKEJI