Unused Parts For Genuine OEM For Porter Cable Product Includes (1) trigger valve assembly as pictured Fits For Porter Cable Finish Nailer for model numbers: DA250C Type 1, DA250C Type 2, FN250C Type 1, FN250C Type 2, FN250C Type 3 For Porter Cable part numbers: 647620-00, 647620-00SV, 64762000 Regulates the compressed air in your nailer