Comparison : Item # 9562C-4, 1/4" O.D. Tube Poly-Hold Compression Fitting-Captive Plastic Sleeve Fitting - Poly-Hold to Standard Compression Straight - Conversion Union
Item # 9562C-5, 5/16" O.D. Tube Poly-Hold Compression Fitting-Captive Plastic Sleeve Fitting - Poly-Hold to Standard Compression Straight - Conversion Union
Item # 9562C-6, 3/8" O.D. Tube Poly-Hold Compression Fitting-Captive Plastic Sleeve Fitting - Poly-Hold to Standard Compression Straight - Conversion Union