Canplas 414323BC PVC Sew 5-Inch x 4-Inch Extension Reducer Bushing Injection molded in Non-Toxic durable White Polyvinyl Chloride (PVC) Flame Retardant, will not support combustion in the absence of an ignition source Maximum Service Temperature Rated at (140F) +60C High chemical resistance to nearly all acids, alkalis, alcohols, halogens and other corrosive media Use approved PVC primer and solvent cement to make PVC Joints