OREGON CHAIN FOR TAS-TANAKA CHAINSAW PITCH 21 THICKNESS 1.5 mm Chain adaptable to models: ECS4000 - ECV-4501 The chain is available in the following links: - 52 links: length 28 cm - 56 links: length 33 cm - 60 links: length 35 cm - 64 links: length 38 cm - 66 links: length 40 cm - 68 links: length 40 cm - 72 links: length 45 cm - 80 links : length 50 cm OREGON