OREGON CHAIN FOR EFCO CHAINSAW PITCH 58 THICKNESS 1.5 mm Chain adaptable to models: 170 - 180 - 171 - 181 The chain is available in the following links: - 55 links: length 40 cm - 62 links: length 45 cm - 66 links: length 50 cm - 73 links: length 58 cm OREGON