Comparison : Item # 1317-18-329, 3/16" Tube O.D. (3/8-24 Thread) x 1/8" MPT Compression 45 Degree Elbow Brass
Item # 1317-18-330, 1/4" Tube O.D. (7/16-24 Thread) x 1/8" MPT Compression 45 Degree Elbow Brass
Item # 1317-18-336, 1/4" Tube O.D. (7/16-24 Thread) x 1/4" MPT Compression 45 Degree Elbow Brass
Item # 1317-18-331, 5/16" Tube O.D. (1/2-24 Thread) x 1/8" MPT Compression 45 Degree Elbow Brass
Item # 1317-18-332, 5/16" Tube O.D. (1/2-24 Thread) x 1/4" MPT Compression 45 Degree Elbow Brass