OptiChamber is a brand of valved holding chambers (VHCs) and related accessories used for respiratory drug delivery, which is part of the extensive healthcare portfolio of Philips. The specific products you listed are manufactured by Respironics Respiratory Drug Delivery (UK) Ltd., a company that was acquired by Philips in 2008. Corporate Structure Parent Company: The ultimate parent company is Koninklijke Philips Electronics N.V., a global leader in health technology with a broad range of professional healthcare and consumer products. Division: OptiChamber falls under the Philips Respironics business unit, a global leader in the sleep and respiratory markets. Manufacturing Entity: The specific manufacturer for the products you listed is Respironics Respiratory Drug Delivery (UK) Ltd., which specializes in the manufacturing of medical and surgical instruments and apparatus. Headquarters: While Philips has its headquarters in the Netherlands, Philips Respironics' operations are largely based in the Pittsburgh suburb of Murrysville, Pennsylvania, United States. Product Focus: OptiChamber Diamond VHC and Accessories The OptiChamber line of products is designed to improve the delivery of aerosol medications from metered-dose inhalers (MDIs) to the lungs, enhancing patient compliance and therapeutic effectiveness. The product EANs you provided correspond to the core valved holding chamber and various sizes of the LiteTouch masks.