This is a Printed Copy, It contains all the information of the Original at a fraction of the cost. This parts list is for the CS-3900 Chain Saw . It has 14 pages of Diagrams covering such things as Crankcase, Cylinder, Oil Pump, Ignition System, Ect. It has the Part #'s & Part Names, You could almost Overhaul a Saw by looking at the Diagrams. It is printed on standard paper size 8 1/2" x 11". Please look at my other products as I have more Parts list. Thanks for looking and have a great day.