If you already own the full set of acrylic bobbins for the DMC colours but have duplicates of the black (310), White, Ecru and B5200 then this is a perfect add-on set.
This set includes a total of 24 bobbins:
310 (x6)
White (x6)
Ecru (x6)
B5200 (x6)
The numbers and colour swatches are printed directly onto the acrylic so they aren’t going anywhere - no more stickers coming off, hooray! The slits also hold the floss firmly to stop any unraveling. They are made from 3mm thick acrylic making them strong and durable.