Material: Made of silicone material, it can be used for a long time and not damage the charging port of your devices, is very durable. Overall Size: 9x5x4.5mm; Outside Install Size:6.5 x 2.3 mm. Purpose: The Anti Dust Cover will protect computer ports from dirt, dust, and liquid splashes, keep the ports clean and durable. Simple to use: The soft silicone makes it easy to install and disassemble, and can be replaced quickly. The package contains: 50pcs Micro USB Cap Port Covers(include 25pcs white & 25pcs black). NOTE: Please check that our products are suitable for you before you buy them. Overall Size 9x5x4.5mm Outside Install Size 6.5 x 2.3 mm Material Silicone Colour Black, White Type Port Dust Plug Brand Unbranded/Generic MPN MEM9.