1/2" Id Bore

if You Are Not 100% Sure This Is What You Need

Timberwolf

A 42" DECK REQUIRES TWO BLADES

Set of 3 Trimmer Head Spool Covers

Proven Part 4-Pack 20" Full Skip Chain For 20" Bar 3/8" Pitch .050" Gauge 70DL Fits Oregon 72EXJ070G PF340B03 1/2" Id Bore4 Boxes of 20" Full Skip Chainsaw Chain For Echo Length: 20" Pitch: 3 8" Gauge: . 050" Drive Links: 70 Full Skip: Full chisel professional grade chain with more spacing between cutting teeth to reduce drag and clear chips better. High Risk of Kickback Injury Fits Echo Models CS 451, CS 452, CS 500, CS 510EVL, CS 550EVL, CS 590, CS 600P, CS 620P, CS 620PW, CS 650EVL, CS 660EVL, CS 670, CS 680, CS 750, CS 6700, CS 8000, CS 800P (All Must have a 3 8"