CK 10N49 3A5 Cup Alumina 5/16" x 1-27/32" Alumina nozzles are made from high strength alumina materials, have very good electrical insulating properties; exceptionally high impact resistance, heat resistance and thermal conductivity; and resist spatter build-up. They are recommended for most welding operations except for use in confined areas. Series: 3 Series What Series is my Torch? Knowing the series of your torch takes the guess work out of finding consumables and replacement parts. 2 Series: torches includes 9, 20, 100, 110, 130, 200, 230FL2L, CKM230, CWH230, WCM230 torches and other popular torches of Weldcraft, Lincoln, WeldTec and Profax with similar models. 3 Series: torches include 17, 18, 26, 150, 210, 300, 510, Trimline, FL3L, CKM350, CWHTL300, CWH350, CWM350 and other popular torches of Weldcraft, Lincoln, WeldTec and Profax with similar models. 4 Series: stubby consumables are compatible with 17, 18, 26, 150, 210, 300, 510 Trimline, FL3L, CKM350, CWHTL300, CWH350, CWM350 torches. 51 Series: consumables are compatible with the CK510 torches. 8 Series: torches include 24, 24W, 80, 90, 180, CWH180, CK24W. Contact Us: Discount Welds LLC 2745 NW 21st St, Miami, Florida 33142, United States