Comparison : Item # 9162-2, 1/8" O.D. Tube Captive Brass Sleeve Compression Fitting - Straight Union
Item # 9162-3, 3/16" O.D. Tube Captive Brass Sleeve Compression Fitting - Straight Union
Item # 9162-4, 1/4" O.D. Tube Captive Brass Sleeve Compression Fitting - Straight Union
Item # 9162-5, 5/16" O.D. Tube Captive Brass Sleeve Compression Fitting - Straight Union
Item # 9162-6, 3/8" O.D. Tube Captive Brass Sleeve Compression Fitting - Straight Union