12 WHISPER FLEX LINE STAINLESS STEEL FOR USE INDOORS/OUTDOORS STAGGERED PITCH EVERY 2 INCHES TO ELIMINATE THE NUISANCE OF WHISTLING FOUND DURING NORMAL INSTALLS UN-BAGGED 1/2 OD - 3/8 ID 1/2 FEMALE PIPE THREADS ON ONE END AND 3/8 MALE PIPE THREADS ON THE

HPC SSC-W12 12 WHISPER FLEX LINE STAINLESS STEEL FOR USE INDOORS/OUTDOORS STAGGERED PITCH EVERY 2 INCHES TO ELIMINATE THE NUISANCE OF WHISTLING FOUND DURING NORMAL INSTALLS UN-BAGGED 1/2 OD - 3/8 ID 1/2 FEMALE PIPE THREADS ON ONE END AND 3/8 MALE PIPE THREADS ON THE OTHER.