Check the listing for details. 1/4" 5/16" 3/8" 1/2" 160Pcs Compression Insert Tube Fitting. Condition: New. Listed at 18.23 USD. Brass compression fittings are primarily used in plumbing and light industrial applications,as well as some home repairs, and their wide range of capabilities makes them a solution for a variety of compression fitting needs.SpecificationColor: BrassMaterial: BrassOuter Diameter:1/4" , 5/16" , 3/8" , 1/2" Inner Diameter:3.7 ，5.4 ，5.8 ，8.7mm/0.15",0.21",0.23",0.34"Tube Diameter:4 ，5.8 ，6.3 ，9.4mm/0.16",0.23",0.25",0.37" Total Length:13 ，14 ，14 ，17mm/0.51",0.55",0.55",0.67"Packing List:160x Brass Compression InsertsAdvantagesMade of brass material, durable, corrosion-resistant and not easy to rust, and can be used for a long time. These sleeves have a smooth surface and can be re-assembled many times to ensure a tight fit without affecting the sealing.