VAPKER PC Computer Screws Standoffs Set Assortment Kit Pack of 231 PC Case Screws Kit 231Pcs 6pcs Black Thumb screw(6# - 32), 6pcs Silver Thumb screw(6# - 32),24pcs case screw for power(6# - 32), 30pcs screw for hard drive(6# - 32) 30 pcs CD-ROM set screws (M3 x 4), 50pcs case fan screw with two colors,each color 25 pcs(M5*10KB) 25pcs brass pillar standsoff for mainboard(M3*6+6);30pcs Main board fixed screws(M3 x 5) 30pcs insulated washers in one plastic case(M3)