The Sticklers™ MCC-CCR250 CleanClicker™ 750 Refill is a replacement for the MCC-CCU250 cleaning cartridge, with the same 750+ cleaning capacity for SC, FC, E2000 UPC/APC and ST connectors. It will save 30% over the cost of a new cleaner. Color coded BLUE for easy identification of connector size. Two refill cartridges per package.