This is a Genuine Echo 91PX62CQ 18" Chain 62 Drive for CS-370, CS-370F, CS-400, CS-400F, CS-4010 and DCS-5000 18" Chainsaws. ECHO's 18 in. replacement chainsaw chain (91PX62CQ) is designed with unique chamfer chisel cutters to deliver low vibration and low kickback. This will increase performance and durability while providing additional safety to the user. By replacing your chain with a genuine ECHO replacement chainsaw chain that's been manufactured to deliver maximum performance and reliability you help to extend the life of your chainsaw bar and keep your equipment running at peak performance. Fits Models: CS-370 S/N: C06212001001 - C06212999999 Chain, Guide Bar CS-370 S/N: C08011001001 - C08011999999 Chain, Guide Bar CS-370 S/N: C08911001001 - C08911999999 Chain, Guide Bar CS-370 S/N: C09913001001 - C09913999999 Chain, Guide Bar CS-370 S/N: C33514001001 - C33514999999 Chain, Guide Bar CS-370 S/N: C33714001001 - C33714999999 Chain, Guide Bar CS-370 S/N: C69515001001 - C69515999999 Chain, Guide Bar CS-370F S/N: C27611001001 - C27611999999 Chain, Guide Bar CS-370F S/N: C27713001001 - C27713999999 Chain, Guide Bar CS-370F S/N: C33614001001 - C33614999999 Chain, Guide Bar CS-370F S/N: C69615001001 - C69615999999 Chain, Guide Bar CS-370F SN C27512001001 - C27512999999 Chain, Guide Bar CS-370F SN C27611001001 - C27611999999 Chain, Guide Bar CS-400 S/N: C10013001001 - C10013999999 Chain, Guide Bar CS-400 S/N: C08111001001 - C08111999999 Standard Guide Bar, Saw Chain, Kick Guard CS-400 S/N: C08111019801 - C08111999999 Chain, Guide Bar CS-400 S/N: C09212001001 - C09212999999 Chain, Guide Bar CS-400 S/N: C10013001001 - C10013999999 Chain, Guide Bar CS-400 S/N: C33714001001 - C33714999999 Chain, Guide Bar CS-400 S/N: C69715001001 - C69715999999 Chain, Guide Bar CS-400 S/N: F00512001001 - F00512999999 Chain, Guide Bar CS-400 S/N: F00613001001 - F00613999999 Chain, Guide Bar CS-400F S/N: C33814001001 - C33814999999 Chain, Guide Bar CS-400F S/N: C69815001001 - C69815999999 Chain, Guide Bar CS-400F SN C27812001001 - C27812999999 Chain, Guide Bar CS-400F SN C27911001001 - C27911999999 Chain, Guide Bar CS-400F SN C28013001001 - C28013999999 Chain, Guide Bar CS-4010 S/N: C91315001001-C91315999999 Chain, Guide Bar CS-4010 S/N: C97112001001-C97112999999 Chain, Guide Bar CS-4010 S/N: C97213001001-C97213999999 Chain, Guide Bar DCS-5000 S/N: 401CSR000001 - 401CSR999999, 419CSR000001 - 419CSR999999 GUIDE BAR, CHAIN, SCABBARD