Electrols manufactures tb 56-ilt- [20 a], barrier terminal blocks, series 50. Features of the barrier terminal blocks: these are single row, high barrier, with moulded brass tinned insulated feed-through turret terminals. Specifications of the terminal blocks from electrols: at present 4-way terminal blocks are readily available; 6- and 8-way terminal blocks would be shortly available. These terminal blocks are moulded in nylon glass filled and are specially designed for high voltage applications.