1. Suitable for car air-conditioning replacement and maintenance. 2. 10 caps high side port 16 mm ,and 10 caps low side port 13mm. 3. Pressure resistance, corrosion resistance. 4. Seals are included in the caps. 5. Universal fit for most of vehicles. Colour: black Material: plastic Package Contents: 10 x High style valve core cover 10 x low style valve core cover Note: 1. Please check as much as possible to make sure the item is that you need. 2. Instruction is not included.Professional Installation Is Highly Recommended! Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.