The Shen Hao SH617 is a 6x17cm wide-format rollfilm back for 4x5 cameras. Attaches to Graflok-style backs, uses standard 120 rollfilm. Simple and easy to use, with red-window film advance and sturdy metal construction. This outfit includes the back itself and a matched groundglass focusing attachment which compensates for the extra distance from the focal plane. These are essentially handmade, so the finish isn't flawless, with some toolmarks here and there- not from wear, that's just how they're made. Otherwise in excellent condition, with instructions.