Features: Brand new and high quality Round spacer is nylon plastic, smooth good heat resistance, highly strength and long service life. We offer you 100pcs black plastic spacer sleeves, with different height to choose from to meet daily need. Plastic pipe spacer have good highly temperatures resistance, spacer sleeves prevent screw deformation, corrosion circuit of circuit board and increase contact to reduce pressure and protect part. Plastic spacers packed in classification box with size labels that can quickly identify and select the desire size, making them easy to use, store and carry. Insulation washers have good performances and suitable for communications, electronic devices etc. Specifications: Material:Nylon Size:5mm/6mm/0.8cm/10mm/12mm/16mm/18mm/21mm Package Includes: 10Pcs 5mm Nylon Spacer 10Pcs 6mm Nylon Spacer 10Pcs 0.8cm Nylon Spacer 10Pcs 10mm Nylon Spacer 10Pcs 12mm Nylon Spacer 10Pcs 16mm Nylon Spacer 10Pcs 18mm Nylon Spacer 10Pcs 21mm Nylon Spacer note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.