Feature 1Function: The R12 to R134A conversion kit effectively repairs your AC air conditioner refrigerant, providing a perfect fit and optimal performance, while also forming a secure seal and maintaining its shape. 2Proper Size: The low side (blue cap) measures 1/4'' (7/16''-20) x 1.3cm/0.51in, while the high side (red cap) measures 1/4'' (7/16''-20) x 1.6cm/0.63in. Appropriate size for effortless installation. 3Compatibility: The high and low pressure R12 to R134A retrofit kit is compatible with a 1/4'' female to 7/16"-20 UNF connection and is designed to accept R134A quick disconnect hoses. 4Compact and Portable: The R12 to R134A AC retrofit fitting adapter kit is designed to be compact and portable, making it convenient for storage and use. It allows for easy filling and hassle-free repositioning, ensuring no oil leakage occurs. 5What You Will Get: The R12 to R134A conversion kit includes a 90 low side R12 to R134A convert adapter, a 90 high side retrofit adapter, a low-pressure side AC fitting port retrofit adapter, a high-pressure side AC fitting port retrofit adapter, all equipped with dust caps. Additionally, it comes with two valve core removal tools for easy and quick installation. Item Name: R12 to R134A AC Fitting Conversion Adapter Kit Main Material: Copper, Aluminum Product Color: Gold Package List 1 * 90 Low Side R12 to R134A Convert Adapter with Dust Cap 1 * 90 High Side Retrofit Adapter with Dust Cap 1 * Low Pressure Side AC Fitting Port Retrofit Adapter with Dust Cap 1 * High Pressure Side AC Fitting Port Retrofit Adapter with Dust Cap 2 * Valve Core Removal Tools