PRISM The Colors Of Friendship: Bobbin Box. Create beautiful bracelets and necklaces for yourself or your very best friends! This kit includes one 10 1/2x7x1 3/4 inch plastic case with snap closure and twenty four compartments, twenty five plastic bobbins wrapped with 4 yards of 100% cotton Prism floss, twenty five empty plastic bobbins, and seventy five plastic beads. Imported.