Hydro carbon blend refrigerant is most environmentally friend refrigerant with zero ozone depletion potential(O.D.P.) and near zero global warming potential(G.W.P.).It's the right choice for replacement with inexpensive lubricant and less charging rate but it will provide good performance and prolong the refrigeration equipment than R-12 and R-134a.It has specific character of DROP-IN material that possible for use without change of design for the existing system.