OREGON CHAIN FOR ALPINE CHAINSAW 73 PITCH THICKNESS 1.5 mm Chain adaptable to models: PRO55 - PRO56 - PROF65 - PROF66 - 600 - 600i - P650 The chain is available in the following links: - 59 links: length 40 cm - 64 links: length 45 cm - 68 links: length 45 cm - 72 links: length 50 cm OREGON