CRJ 6-32 UNC Extra Long 1-3/8" (34mm) Computer Radiator Fans Screws Set for 25mm and 30mm Fans - 20 Screws and 20 WashersThe screws in this set measure 34mm and allow for significantly more acommodation of fan accessories like dust filters, grills, ducts, and LED rings with 25mm fans20 1.6mm washers are included for protecting surfaces and act as spacers increasing compatibility with water cooling radiatiorsSteel screws with a black oxide finish.Total Quantity: 20 screws and 20 washersRoHS Compliant. Screws and washers are manufactured in the United States.