Hello all Specs : 20 ft. 2" O.D. .50" wall chrome moly Yep, .5 " ! Tnx a lot. 73. Steve. K1PEK Steve Davis Senior RF Cable Design Engr. & Founder DAVIS RF Co. a division of Orion Wire Co., Inc. Tel: 978-369-1738 ALSO: Davis Rope & Cable Assembly Co., LLC: Design Engrs, Distribution >