Features: With the included dual head valve core remover tool, this kit simplifies the maintenance and replacement process. Designed for ease of use, it enhances your workflow, reducing frustration and saving time as you tackle your air conditioning conversions with confidence and ease. Specifications: Material: stainless steel, brass, aluminum Color: red, blue, silver Size: Low side r12 to r134a conversion adapter: 1/4''(7/16''- 20) x 13 mm High side r12 to r134a conversion adapter: 1/4''(7/16''- 20) x 16 mm Package includes: 4 x Seal caps (2 x high side and 2 x low side), 20 x R12 valve Core, 10 x R134a valve Core, 1 x High side A/C service valves, 1 x Low Side A/C Service Valves, 1 x Big valve cores 1 x Small valve cores, 8 x sealing rings, 1 x Dual head valve core remover tool Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays