DOP72V068GPA Loop-Saw Chain. 70 Series Vanguard™ Chisel Chain. 3/8" Pitch .050 Gauge 68 Drive Links. Fits Partner model 1655, 2055, 550, 650, 7000, P100, P55, P65, P70, P85, R-11. R-12, R-14, R-16, R17, R-18, R-19, R-20, R-21, R-22, R-23, R-30, R-35, R-40, R-416, R-420, R-421, R-435, R-440, S-50, S-55, S-65 Chain saws.