The dimensions table refers to size following assembly. Modular Adaptors Colour Coded. Adapters with integral RJ45 sockets and leads plus male or female crimped contacts for loading 9 or 25 way D connector plugs and sockets. Assembled D connectors snap-fit into adapter covers. Covers are colour coded for easy connection identification. Finger operated jack screws are included with each adapter. All models are highly reliable and excellent quality.