This Brass spacer can be widely used in high-temperature, high-pressure, and highly corrosive pressure, valves, sealing parts of cylinder heads, and industries such as car, steel mills, chemical equipment, and engineering machinery.Specification Material: BrassSize: 6mm ID x 10mm OD x 18mm L / 0.24in ID x 0.39in OD x 0.71in LCompatible Screw Size: 1/4inch , M6 Screws BoltsPackage List: 5 PCS M6 brass spacerAdvantageMade of durable Brass material, which is hard, good performance, good electrical conductivity, corrosion resistance and can be used for a long time.Instruction Easy to use, just need to install on the with proper diameter.NOTE: Please select the appropriate size according to your needs.