MC Refractory was developed by two chimney sweeps who became frustrated with ordering refractories only to have them arrive broken or receiving the wrong panels all together! ! After much trial and tribulation, MC developed the Model 2239 which worked very well for chimney cleaners and retail stores. When we designed Model 2433 and Model DB4224 it became an instant success. Now chimney sweeps have a manufacturer that understands their dilemma, Time is Money! By carrying a Cut To Fit Refractory on your truck you are able to cut, install, and collect your money on the spot.