Specification:Dimension: 13mm+16mmMaterial:PlasticColor:BlackFeature:1.Suitable for car air-conditioning replacement and maintenance.2.5 caps high side port 16 mm ,and 5 caps low side port 13mm.3.Pressure resistance, corrosion resistance.4.Seals are included in the caps.5.Universal fit for most of vehicles.Package included:10 Pcs/Set Charging Port AC System CapsNote:1.We provide clear pictures, measurements where possible. Please check as much as possible to make sure the item is the one that you need.2. Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm)3.The color of the actual items may slightly different from the listing images due to different computer screen, thanks for your understanding.4.Instruction is not included.Professional Installation Is Highly Recommended!