Lynn Manufacturing Replacement Combustion Chamber Kit, Utica Starfire III & Constellation, 2552901, 2553303, 5611508 KIT CONTAINS: Mounting door insulation & plug 2552901, swing door insulation 2553303, target wall 5611508, floor blanket 25511005, waterglass and instructions. FIT: Fits all Utica Starfire III & IV models including SFH-365, SFH-3100, SFH-3125, SFH-4100, SFH-4125, SFH-5125, SFH-4150, SFH-5175, SFH-5200, SFH-6150, SFH-6225, SFH-7275. Steam boilers begin with SFE. Also fits Utica SW models SW3, SW4, SW5 and Utica Constellation SFM6225W, SFM7275W, SFM24150W, SFM25175W, SFM25200W, SFM26225W, SFM27275W, SFM36225W, SFM37275W, SFM47275W, SFM57275W, SFM67275W, SFM77275W, SFM87275W. ALSO FITS: Also fits Dunkirk Empire Steam II ESB or ESC including ESB0365, ESB3100, ESB4100, ESB4125, ESB4150, ESB 5175, ESB5200, ESB6225, ESB 7275 * ESC0365, ESC3100, ESC4100, ESC4125, ESC4150, ESC5175, ESC5200, ESC6225, ESC7275 Made in the USA by Lynn Manufacturing, Inc. Lynn Item 1096