Shelf Support Pins - Shop online and save up to 8% | UK | LionsHome
IKEA Billy bookcase tip: if you have an OLD Billy bookcase (pre-2014) you can still add extra shelves even though the new extra shelves from IKEA use a new, disc-shaped shelf pin.
IKEA BILLY Shelf Pins #101532 – FurnitureParts.com
IKEA BILLY 121762 SHELF SUPPORT BRACKETS PINS FIXINGS PEGS BRAND NEW SET OF 4 | eBay