The Linergy line of terminal blocks offers a wide selection of blocks and accessories. Linergy terminal blocks have push-in type, spring type, and screw type terminal blocks. A plug-in bridge jumper is used to connect all of the terminal blocks electrically. This plug-in jumper will connect ten 5.2 mm wide terminal blocks. Jumper has a grey cover. Each jumper wieghs 0.32 oz. The jumpers are sold in sets of ten jumpers per package.