ECG / EKG Medical Grade Recording Chart Paper, Z-Fold Pad, Red Grid, 145x100x350, Equivalent to Schiller 2157-005A and AT6, Kendall 30929098, 9874366. Fits Schiller model AT-6 and SP-200 (sold by the pad, 50 pads per case) Availability: Usually ships the same business day Schiller 2157-005A equivalent A17961$3.51 Copyright 2006-2011, A1cardiology.com