Includes (2) A19712 Check ValvesNew, Bulk PackedGenuine OEM Replacement Part # A19712-2PKConsult owners manual for proper part number identification and proper installationPlease refer to list for compatibilityCompatible with the following: Porter Cable: CPF23400S, CPF23400S, CPF23400S, CPF4515, CPF6020, CPF6020, CPF6020, CPF6025VP, CPF6025VP, CPFC2TV3520W, CPFC2TV3520W, CPFC2TV3520W, CPFC2TV3525VP 25 Gallon Vertical, CPFC2TV3525VP 25 Gallon Vertical, CPFC2TV3525VP 25 Gallon Vertical, CPFFR350 A, CFFC350A A, CFFC350A A, CF2800 A 2 8G WB TV 1STG 120, C5100 A 4.5 20G PL 1STG, C5101 A 1.7 20G PL 1STG, CPF6020-W A, C6110, C3101, C3101, CF2020, CF2800, CPF23400S, DeVilbiss: 1WC94, 1WC94, 3JR71, 3JR71, ACBF630, ACBF630, ACBF630, C5100, CF2020, 1WC95, EXFBC50P, EXFBC50P, EXFBC55P, EXFBC55P, EXFBC60P, EXFBC60P, FB50P, FB50P, FB50P, FB55P, FB55P-WK, FB55P-WK, FB5525VP, FB5525VP, HFB50P, HFB50P, HFB50P, HFB50P, HFB6025VP, IRFB50P, IRFB50P, IRFB50P, IRFB55P-WK, IRFB55P-WK, PAFB50P, PAFB50P, PAFB50P, Black and Decker; 919-72432, 919-72432, 919-72432, 919-72550, 919-72550, 919-72550, 919-72550, 919-16555, 919-16561, 919-16561, 919-16561, 919-16561, 919-16670, 919-16670, 919-16728, 919-16728, 919-16732, 919-16732, 919-16778, 919-16778, 919-16778, 919-16778, 919-16778, DeWALT: D55171, D55171