Beadalon 305B-121 No 1-4 Silver Plated 600pc Crimp Bead Variety Pack. Includes: 250 for use with with wire and cords from 0.25 to 0.33mm (0.10 to 0.13 inch). Crimp with the Micro Crimper; 150 for use with with wire and cords from 0.33 to 0.61mm (0.13 to 0.24 inch). Crimp with the Standard Crimper; 125 for use with with wire and cords from 0.60 to 0.66mm (0.24 to 0.26 inch). Crimp with the Standard Crimper; and 75 for use with with wire and cords from 0.66 to 0.91mm (0.26 to 0.36 inch). Crimp with the Mighty Crimper.