OREGON CHAIN FOR EFCO CHAINSAW PITCH 73 THICKNESS 1.5 mm Chain adaptable to models: 170 - 180 - 171 - 181 The chain is available in the following links: - 60 links: length 40 cm - 68 links: length 45 cm - 72 links: length 50 cm - 80 links: length 58 cm - 88 links: length 63 cm - 98 links: length 75 cm OREGON