This Listing is for two(2), Air Filter "flat panel" type Cartridges from an Original Equipment supplier to BMW "Knecht micro-star" Filters! Quality made in Western Germany. They are fresh out of the case and came from a BMW Dealer Inventory from the late 1970's for many of the earlier fuel injected models! These are Vintage "Period Correct" for any High Quality Show-Car or Driver Vehicle! Related part#s are Knecht part# is AG 143, Purolator part# is PM 1645, B/A part# is 042-1057, and BMW equivalent part# 1372 1262 600. Applications would include: the popular US version 1977-79 BMW 320i, and also most 1977-83 European 323i model vehicles! Get a quanity deal on the now discontinued and hard to locate items! Please check the photo Carefully, or with your dealer or specialist catalogs to be sure of your particular application!!! Larger quanity deals are available to Larger user BMW Specialists! THANKS FOR FOR LOOKING AND PLEASE BE SURE TO CHECK OUT OUR VARIOUS OTHER INTERESTING PARTS LISTED ON eBAY!!!