SL series, 24", pro-coat epoxy coated, stainless steel. 1/4" I.D. x 3/8" O.D. tube, 1/2" female pipe thread x 1/2" male pipe thread. Product comes in re-sealable ziplock bags. AGA approved & ias design certified for indoor/outdoor use. Recommended for gas clothes dryers. SL Series 24" Pro-coat epoxy coated Stainles