Specification Brand : BND- SDI Diagnostics BulletPoint : Box of 50 ItemName : 6075993 PT# 29-7920 Filter Bacterial/ Viral Pulmoguard II Plastic FOR Spiro 50/Bx Made by SDI Diagnostics ItemPackageQuantity : 1 ItemTypeKeyword : safety-respirator-cartridges-and-filters Manufacturer : SDI Diagnostics PartNumber : BND-29-7920-50 ProductDescription : This is a box of 50 Individually wrapped PFT Filters that are 99.9% efficient for filter out bacteria and Viruses. Here are dimensions for the filter: ID small side 25.6 mm OD 28.6, Interior wall, ID Large side 26.8 OD 29.8 All wall thickness 1.5mm It fits the following spirometers. Breon – All Models_ CDX – Spiro 110 (remove black fitting), Spiro 850_ Cavitron/Donti – All Models_ Cosmed – All Models_ Creative Biomedics – All Models_ Futuremed – Discovery, Spirobank, Spirovision III_ Medical Equip Designs – All Models (remove black fitting)_ Micro Medical/Direct – All Models_ MIR – Reusable turbine only Multispiro – All Models except PC (remove black fitting)_ Ohio – All Models_ PK Morgan – 232_ Riko – All Models except AS300_ S&M – Keystone_ SDI - SBOffice, SBG, spirotel, Spirolab, Spirolab II, Astra series with 7983 adapter Smiths Medical - All models Spirometrics – All Models except LTE, 2500 LTE_ VacuMed – Discovery, Micro, MicroPlus, MicroGP/DL, MicroLoop, Pony, Spiroscreen, Wizard_ ViaSys - MicroLoop, MicroLab Vitalograph – All Models_Wright Professional Peak Flow Meterxcept Presto Flash ProductSiteLaunchDate : 2013-05-15T21:57:53.405Z SupplierDeclaredDgHzRegulation1 : not_applicable SupplierDeclaredDgHzRegulation2 : not_applicable SupplierDeclaredDgHzRegulation3 : not_applicable SupplierDeclaredDgHzRegulation4 : not_applicable SupplierDeclaredDgHzRegulation5 : not_applicable