Blutide concealed mixer bodies are designed for ease of installation. With two 1/2 BSP x 15mm compression inlets and one 1/2? BSP x 15mm compression outlet. The body is supplied with nuts and 15mm compression rings making the installation quicker and more cost effective for the plumber. In addition the body is supplied with a plastic protective sleeve. This sleeve protects the steel portion of the body during plastering and tiling.