Check the listing for details. 6mm Tube OD Brass Compression Sleeve Ferrules Brass Ferrule Insert Fitting Kit. Condition: New. Listed at 9.44 USD. This brass compression sleeves ferrule is widely used in pipe connection for hydraulic and pneumatic systems, HVAC, humidifiers, etc., suitable for connecting copper, brass, aluminum, or plastic tubing.Specification:Color: Brass ToneMaterial: BrassSleeves Ferrule Size: 6mmx7mmx5mm / 0.24"x0.28"x0.2"(ID*OD*H)Insert Fitting Size: 3mmx5.7mmx14mm / 0.12"x0.22"x0.55"(ID*OD*H)Suitable for connecting 6mm pipe.Packing List: 10 Pack x Brass Ferrule, 10 Pack x Insert FittingAdvantage:The brass ferrule fittings are made of brass, it is durable and reusable.These ferrules have a smooth surface and provide a good seal, providing a secure connection for pipe connections.Instruction:Insert the copper pipe with appropriate diameter into the sleeve, then fixing it to pipe connectors with nuts.NOTE: Please confirm the pipe size before purchasing.