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, WP9...