This Aluminum 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: Aluminum
Color: Silver
Size: 4.2mm ID x 8mm OD x 20mm L
Compatible Screw Size: 5/32" , M4 Screws Bolts
Package List: 5 Pcs M4 Aluminum spacer

Advantage
Made of durable Aluminum 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 screw bolts with proper diameter.

NOTE: Please select the appropriate size according to your needs.