Kitchen Kit FLATPACK VALUE SLAB STANDARD MATT WHITE SAMPLE. Delivery Information - 3 days for mainland UK, up to 12 days for NI, Highlands and Islands. 570X396 Sample Door. Kitchen Kit products are only available online and not in store. Finish: Standard Matt, Colour: White, Dimensions (LxWxH): 396 x 18 x 570mm. Want to know if this Kitchen Kit design is the right fit for your home? Order this kitchen cabinet sample pack and see for yourself - it's a great way to view the colour and door design in your own kitchen, before committing to the full order. Kitchen Kit Flatpack Value Slab Standard Matt Sample in White.