The All-Plumbs are leveling devices that fit between two sections of a standard range pole or the NEW All-Adapt, so you can keep the pole/prism level. The all-plumbs are made of 2? aluminum channel, with a large bubble, which is factory adjusted. The new all-plumb extra has a more accurate bubble, the sensitivity is 20 minutes, while the ALL-PLUMB is 30 minutes. The All-Adapt allows you configure how high YOU want the prism. It can be a double male or female or a combination to both. Can be used by it self or with any length pole extension to make a very inexpensive but accurate prism pole. Made of zinc plated steel with an aluminum core. The range poles are made of aluminum tubing that has red/white alternating stripping. They come in three lengths with replaceable point and orange cordura carrying case.