Hard-wearing material: our reservoir valve rubber gasket are made of silica gel, safe and soft, in addition, they are durable enough for serving for a long time Compatible model: it is suitable for WP250, WP260, WP270, WP300, WP305, WP310, WP100, WP112, WP113, WP115, WP117, WP-900, WP130, WP140, WP900,and other brand like VAVA, H2o and so on Easy to use: replacement part for reservoir valve gasket, makes the lid sit tighter and not fall off while lifting the lid to add water or get tips, keep with factory pressure, don't let the water stain and residue reduce factory setting pressure, these gaskets work well and are easy to install What you get: large quantity serve for you to use, recommend to change your gasket every 3 months for hygiene issue and efficiency Warm notice: recommend to check the model number for better compatibility before purchasing