Features: Can be stretchable and convenient to install. Not easy to fall out and durable. Convenient for cleaning fish tank. 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 Specification: Material: Acrylic Type: Stretchable Size: Suitable for all kinds of fish tank(0-52mm thick). Can match with water pipe that outside diameter for 16mm and inside diameter for 12mm. Shipping color: gray Quantity shipped: 1