Chainsaw chain 18″ .325 1.5mm 0.058″ 72DL fits 4500 (45cc), 5200 (52cc) and 5800 (58cc) Chinese chainsaws and also Plantiflex, BBT, B&Q, Silverline, Sanli, Whitemoss, Skatco, Eckman, Timbertech, Tarus and MT-9999 chainsaws. With .325″ pitch, 1.5mm (0.058″) gauge and 72 drive links, this is a commonly used specification across a wide range of budget and mid-range Chinese-built saws fitted with an 18″ guide bar. A chain that has stretched beyond its serviceable limit will ride loosely on the guide bar, produce rough and inefficient cuts, and put additional strain on the drive sprocket and clutch. Replacing it with a correctly specified chain restores proper tension, clean cutting and safe operation.