Specifies using shrinkage bar moulds for the willpower of soundness. The extrade in period of the specimen is decided with the aid of using Length Comparator indexed withinside the concrete section. Two fashions are offered. One is supplied with chrome steel clean reference factors whilst the alternative is supplied with knurled and threaded reference factors. Both the fashions are to be had as unmarried mold and a couple of mold compartments. Each mold is provided whole with base plate and  reference factors according to compartment of mold.