TYPE AE CORE (to fit AMERICAN AIR FILTER ROLL-O-MATIC)	Core is machined from 3/4" I.D. (1 1/8" O.D.) black pipe and metal discs (end plates) of approximately 11" diameter are attached.
	TYPE CB CORE (to fit CAMBRIDGE AUTOROLL)	Core is machined from 3/4" black pipe. No metal discs are used. (If desired, please specify.)
	TYPE AM CORE (to fit AIRMAZE ROLL-A-MAZE)	Core is formed from fiberboard tube with 1 7/8" I.D. Tube has recessed cups secured in each end with a depth of 5/8". Cup is stamped to form a 1 1/2" X 3/4" rectangular slot.
	TYPE F CORE (to fit FARR CO. ROLL KLEEN FILTERS)	Core is formed from 2 1/8" I.D. fiberboard tube, using no drive pin, cups or discs. Style V-8 core has 1 7/8" I.D.
	TYPE CR CORE (to fit CARRIER CORPORATION SERIES 31 NA ROLL FILTER)	Core is formed from a 2 7/16" fiberboard tube. The tube contains a metal cup secured in each end and recessed to a depth of 1 1/2". The cup is stamped to form a 1 1/2" square opening.
	TYPE C CORE (to fit CONTINENTIAL CONOMANUAL OR CONOMATIC)	Core is formed from 3" fiberboard tube. A drive pin is located 2 1/2" from one end of tube only. No cups or discs are used. Type C core also available in metal tube, please specify.
	TYPE T CORE (to fit TRANE COMPANY ROLL FILTER)	Core is formed from 2 7/16" I.D. fiberboard tube. The tube contains a metal cup secured in each end recessed to a depth of 1 1/2". The cup is stamped to form a 1 1/2" square.
	TYPE L CORE (to fit COMMERCIAL FULFLO UNITS and MINE SAFETY APPLIANCE units)	Core is formed from a fiberboard tube with 3" I.D. A drive pin is located 2 1/2" from tube end.