This is the early style TeleVue 1 1/4" mirror diagonal. As can be seen in the photo there are some thumbscrew marks in the chrome barrel. If that bothers you... well... ah... don't buy this one. But if you want a nice mirror diagonal that works great at a reasonable price then this is the one for you. Typical TeleVue, well built and no plastic. $45 postage paid in the US.