Item Name: Valve Dental Chair Square Dental Foot Switch Valve Dental Chair Accessories. Description Type: Dental medical equipment accessoriesFunction: Air control of turbine hexagonal water pressure valveQuality: high quality and durableApplicable object: adultsPacking: 1 piecePackage Included:1* piece of dental chair accessories notes:Product color may vary slightly from the picture due to different lighting and screen settings.Due to different manual measurements, please allow slight size differences. Thanks!