OREGON CHAIN FOR CHAINSAW ECHO PITCH 20 THICKNESS 1.3 mm Chain adaptable to models: CS-3600 - CS-3900 - CS-400 - CS520 - CS-4000 - CS4400 - CS4500 - CS5000 - CS4500 - CS-400EVL - CS440EVL - CS-4400EVLH - CS3700 - CS-4200 - CS-510 - CS4100 The chain is available in the following links: - 56 links: length 33 cm - 61 links: length 35 cm - 64 links: length 38 cm - 66 links: length 40 cm - 72 links : length 45 cm OREGON