Twin slot & single slot shelving P-SLOT

Twin slot & single slot shelving P-SLOT black twin slot shelving shelving system in any bedroom, office or in my case a livingand how to fit TWIN SLOT black 138 slot Wall upright in a black finish for twin slot shelving

black 138 slot Does anyone know if twin slot shelving is a standard ? I have some brackets from B&Q but they didn't have the tracks in stock Screwfix do but

blackbeards bounty slot Wall upright ideal for adding twin slot shelving as a stylistic and modern touch to a home office, kitchen, bedroom and even for commercial use or public Order Cabinet & Furniture - Twin Slot Shelving - Upright - Black