Air filter plus spark plug and fits the following Stihl machines BT120, BT121, FR350, FR450, FR480, FS120, FS200, FS250, FS300, FS310, FS350, FS400, FS450, FS480, HT250, MM55, SP200, SP400, SP450, SP451 & SP481.
Filter dimensions: 86 mm x 70 mm x 25 mm.
Similar to Stihl Part No: 4134 141 0300 & 0000 400 7000
Part number 53344 (1) + L7RTM (1) is a quality item.
Please check your old air filter as some models use a foam filter instead of this type of paper cartridge.