Transparent valve body design allows for clear visibility of operation status during normal use. Double-leaf design improves upon outdated single-flap models, enabling faster opening and efficient smoke flow. Resistant to oil buildup and prevents smoke leakage; equipped with a silicone gasket and soft washers for strong sealing performance and odor prevention. Spring-assisted check valve ensures long-term durability without deformation, maintaining reliable sealing performance. Product Name: Pipe Check Valve Specifications: C: Double-sided smoke pipe Color: White Material: Plastic Package Contents: 1 x Pipe Check Valve Note: Other items not included. Lighting and display settings may cause slight color variations between the image and the actual product. Measurement tolerance: ±1–3 cm.