Canplas 414240BC PVC Sew 4 MPT Flush Plug Injection molded in Non-Toxic durable White Polyvinyl Chloride (PVC) Hand tighten plus a half turn provides a complete seal Teflon tape is recommended for threaded joints Flame Retardant, will not support combustion in the absence of an ignition source Maximum Service Temperature Rated at (140F) +60C