This is a genuine STIHL muffler gasket with part number 4144-149-0600. It is a brand new, OEM (Original Equipment Manufacturer) product designed to fit specific STIHL models such as BR200, BG56, BG86, SH56, and SH86. This muffler gasket is made of high-quality materials that deliver excellent performance and longevity. It is a must-have replacement part for maintaining the optimal operation of your leaf blower and vacuum equipment.