Construction: Crafted from high-quality brass and aluminium alloy, the adapters in this kit offer excellent sealing and heat resistance. Their sturdy build ensures they are not prone to rust, and their leak-proof design guarantees reliable performance. Optimal Size for Easy Use: The low side adapter (blue cap) measures 1/4inch (7/16inch-20) x 13 mm, and the high side adapter (red cap) is 1/4inch (7/16inch-20) x 16 mm. These dimensions a hassle-free installation, saving time and effort. Universal Compatibility: Designed to fit 1/4inch female to 7/16inch-20 UNF connections, this kit accepts R134A quick disconnect hoses, making it a versatile solution for various AC systems. Comprehensive Kit Components: This R12 to R134A conversion kit includes 1 x 90° low side and 1 x 90° high side retrofit adapters, along with low and high pressure side AC fitting port retrofit adapters, each equipped with a dust cap. Additionally, it comes with 2 x valve core removal tools for easy installation. Versatile Application: The kit includes two 90° and two straight type AC fitting port retrofit adapters, suitable for most AC air conditioner refrigerant systems. The included valve core removal tools simplify the maintenance and repair processes., Manufacturer: Jkjlorey