Axiom Accessory Boxes: Axiom wiring accessories include a comprehensive range of Junction boxes, Surface Pattress boxes and Dry Lining back boxes as well as SP and DP Connector blocks - all with the necessary BS standard approvals. Junction boxes come in white or black, Pattress boxes are available in 1 or 2 and come in 4 depths from 16mm to 45mm. Use to convert 1 boxes to 2 . Quick and easy to install.