Amazon.com: Ikea ' New KALLAX Shelf Unit, Black-Brown (White, 44 1/8x57 7/8) : Home & Kitchen
KALLAX Shelf unit, white, 30 3/8x30 3/8" - IKEA
Kallax 2x3 hack (x-post from r/ikeahacks) : r/IKEA
Amazon.com: ReplacementScrews Hardware Kit Compatible with IKEA KALLAX 3 x 3 Shelf Unit 404.156.01 - All Screws (104321) and Dowels (101339) : Home & Kitchen