Comparison : Item # 9162R-42, 1/4 x 1/8" O.D. Tube Captive Brass Sleeve Compression Fitting - Reducing Straight Union
Item # 9162R-43, 1/4 x 3/16" O.D. Tube Captive Brass Sleeve Compression Fitting - Reducing Straight Union
Item # 9162R-54, 5/16 x 1/4" O.D. Tube Captive Brass Sleeve Compression Fitting - Reducing Straight Union
Item # 9162R-64, 3/8 x 1/4" O.D. Tube Captive Brass Sleeve Compression Fitting - Reducing Straight Union
Item # 9162R-65, 3/8 x 5/16" O.D. Tube Captive Brass Sleeve Compression Fitting - Reducing Straight Union