Poulan PP5020AV Replacement Pro chainsaw saw chain for 20" factory bar.Part number is 72LGX070G in Oregon.This is OEM Pro Oregon chain same specs as 72V part# 577180501 and 952-051266installed on 20" factory bar. Professional replacement for D70 packaged chain.These chains are the new LGX pro series with the blued cutters for improved strength-very fast cutting-and what all the loggers use in this area.These are not safety chains.These are full Chisel cutters made from OCS-01 steel provides greater durability especially in cold cutting conditions.The top of the tooth have the file marks stamped on them- no more guessing at the angle. Normal retail list is $28.92 each. We buy in volume and pass on the savings to you.These chains fit most of the big 20 inch echo, older poulan, homelite and McCulloch. These chains are 3/8 pitch .050 gauge and 70 drive links. If you have a 72 stamped on your drive link and there is 70 drive links these will fit your saw.