ECG / EKG Medical Grade Recording Chart Paper, Roll, Red Grid, 140x43, Equivalent to: Corometrics 4483-AAO and B4483-AAO, Kendall 30589132, 1387264 Fits Corometrics model 145 (sold by the roll, 50 rolls per case) Availability: Usually ships the same business day. Corometrics 4483-AAO equivalent A19331$4.39 Copyright 2003-2005, 2006 A1Cardiology.com