The PEX Chair slab organizer from Sioux Chief Mfg. Co. is designed to support single 3/8-inch through 3/4-inch PEX supplies on residential or commercial, multi-floor construction projects. The organizers can be connected in parallel or offset configurations using an interlocking tongue and groove. The raised midsection allows concrete to flow through and around the device. The rear contour is made to abut vent pipes. Other features include rebar receiver for ground staking and height adjustment for precast deck over pours. 800/821-3944; www.siouxchief.com.