Aquarium Test Tube: this test tube is very suitable for use as a container for aquarium water quality testing; Clear scale, self standing base, sealed screw cap, not easy to break
Durable Material: the product is made of reusable thickened plastic, which is sturdy and resistant to falling, strong and durable; The reusable feature can provide a more economical and affordable experience
Silicone Seal: our test tube is a rotating threaded cap with a silicone seal ring inside, which will not leak under 80kap negative pressure test; Effectively protect the measured liquid quality