This proppant is an optimum solution for well sites with shallow depth and pressure up to 6 000 psi (414 atm). It has low bulk weight and high sphericity and roundness, which provide high incremental steps of hydrocarbon yield at well sites with little formation pressure. It is a perfect solution when linophyric jells are used. At present JSC "Borovichi Refractories Plant" produces the following fraction assortment: 12/18,16/20,16/30,20/40, 30/50