SpeedPak 10-Pack Replacement Titanium Bonded Dubbed Blade Cartridges (100 Blades)10-pack SpeedPak replacement blade cartridges. Each cartridge houses 10 double-edged Titanium Bonded Dubbed blades that are 3x harder than steel and will stay sharper longer. Blades resist corrosion and adhesives. Cartridge allows for quick, easy and safe blade changes on the go. For use with SpeedPak Knife #18038. Includes 100 blades total. Green cartridge.