1 x Brand New Best Quality Aftermarket Replacement Chainsaw Chain for Spear & Jackson SPJCS 3740, SPJCS 3740/1, SPJCS 4040 Chainsaw models fitted with 16" Guide Bars, Comes with 4mm round file for easy sharpening FITS BAR SIZE = 16" CHAIN PITCH = 3/8" CHAIN GAUGE .050" DRIVE LINKS = 57