Specifications:Small handle design, more convenient to switch the valve.Durable and easy to use, quick to install.Its easy to disassemble and clean.Item Name: Shut Off ValveMaterial: PlasticSuit for: 4mm Tube Features: Fish Tank Accessories, Swing Type, Durable 1. Due to different monitors and lighting effects, the actual color may be slightly different from the image 2. Due to manual measurement, please allow 1-3cm deviation Note: The one with the OUT side is the outlet, and the other side is the inlet. Size: total length 36mm, diameter of middle circle 8mm, both ends: inner diameter 3mm, outer diameter 4mm, suitable for common trachea (inner diameter 4mm) Shipping color: blue Quantity shipped: 2