Up for Buy-It-Now is a new old replacement stock air cleaner diaphragm with an unknown remanufacturer.  According to the box, this is GM part number 6484245 and is used on the following models and years:

1965 Buick...w/ 350 V-8 (2Bbl.)
1969-1971 Buick..w/ L-6 engine, Heavy Duty w/ Air Cleaner
1970 Buick..30-4000 (4Bbl.), w/ Dual snorkel air cleaner
1972 Buick..Models 3437-67 (4Bbl.)
1973 Buick.. Body code models B, C, E LeSabre, Centurion, Electra 225, Riviera w/ 455 engine, less chrome Air Cleaner

1968-1971 Oldsmobile Toronado
1969-1971 Oldsmobile..L-6
1971 Oldsmobile 4400, Except O.A.I.

1968 Chevrolet..Full Size (4BC w/ A/T) (327, 350)
1968 Impala, Caprice, Malibu, Concours, w/ A/T (307)
1969 Chevrolet Passenger.Full size, w/ A/T, 6 cylinder
1969 Chevy II, Camaro w/ A.T. 307, 327
1969 Cehvelle (deluxe), w/ A/T 307
1969 Nomad, Greenbrier w/ A/T (307)
1970-1972 Chevrolet..Full size, All 6 cylinder
1970-1972 Nova, Camaro (307)
1970-1972 Chevelle, Nomad, Greenbrier, El Camino (307) (except El Camino Custom)

  The assembly is in brand new, never used condition and is free of any damage.  The original box is also in good condition.  Please feel free to E-mail me questions.  International bidders are always welcome.  Thanks for looking !!!