Dear Sir/Madam,This is LiewYih Hao from MY.I'm looking for products with the following specifications:HALF FACE RESPIRATORBRAND: THREE MMODEL: 7501 SSERIES: 7000 SERIESDESCRIPTION: ULTIMATE REUSABLE, SOFT SEALING SURFACE, ALONG WITH UNIQUELY DESIGNED COOL FLOW EXHALATION VALVE, TO ENHANCE WEARER COMFORTABLE AND FACE FIT Show More