Package Includes 2 pcs G1/4" Pass-Through Connector Fittings. Thread Size: G1/4" Thread. Material: made of high-quality brass, rust and corrosion-resistant, sturdy and durable. Design: Hidden O-ring rubber gaskets design for sealing and preventing water from leakage, and the Pass-Through joint can be fixed to the panel with the equipped clamping nut, which can clamp and fix a wood or a panel with the thickness up to 6.50 mm. Application: Suitable for PC Water Cooling System Fittings, to connect the internal and external joints of the chassis or water tank.