This 5-piece kit was developed for projects in which the local electrical code does not require conduit for the low-voltage sensor wire or the power leads. It includes everything that an electrician needs for a professional thermostat installation, without the conduit and related parts. 4″ x 4” double-gang box 1⁄2” single-gang mud ring (25) 3/16″ or 5mm low-volt staples 5” cable protector3/8″ x 4″ black flex tube *Always verify local code requirements for suitability and compliance before installing any electrical system.