Dimensions - 25mm Advantages - There is clear and flexible silicone in the middle of the fish tank connector for good sealing. PREMIUM MATERIAL - Aquarium connector made of PVC with polished surface, clear thread and easy to use Application-Aquarium water pipe joints are widely used in the opening connection of the inlet and outlet pipes of fish tanks, water tanks, buckets, etc. < p>Tips- If the thickness of the glass is thin, the thread length can be shortened to achieve the sealing effect. Package Contents: 5* Connector