Check the listing for details. 40Pcs Brass Compression Insert Compression Insert Tube Support for 3/8" OD Tube. Condition: New. Listed at 17.85 USD. Brass compression inserts are suitable for compression connections for plastic, nylon hoses, etc. They are widely used in hydraulic and pneumatic systems, HVAC, humidifiers, etc.SpecificationColor: Gold ToneMaterial: BrassSuitable for Tube OD: 9 mm/3/8 Inch Height: 14 mm/0.55 InchSize: 6.3 x 9 mm/0.25 x 0.35 Inch(OD*Base Dia)Package List: 40 Pcs x Brass Compression InsertAdvantageThe brass compression insert is made of durable and reusable brass material which is strong and not easy to wear, has corrosion resistance, and high-pressure resistance, and can be used for a long time. It is suitable for different types of environments.The surface is smooth and burr-free, the bite is tight, and it is not easy to get stuck or leak oil, providing a secure connection for hose connections.