OREGON CHAIN FOR BLITZ CHAINSAW PITCH 21 THICKNESS 1.5 mm Chain adaptable to models: B42 - B45A - B54A - B46 - B51 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 45 cm - 72 links : length 45 cm - 78 stitches : length 50 cm OREGON