Features 1. W21 to 1/4 SAE refrigerant filling adapter with reliable sealing performance. 2. Made from high-quality brass material for durability and resistance to wear. 3. Compatible with R32, R134A, R407A, R404A, R422A, R422D, R507, R407C, R417A, R437A, and R407F refrigerants. 4. Supports 1/4 SAE male thread connection for stable performance and minimal risk of gas leakage. 5. Professionally manufactured for safe and reliable use in refrigerators and air conditioning systems. Specification Item Type: Refrigerant Adapter Material: Brass Weight: Approx. 56g (2oz) Male Thread Size: 1/4 SAE Female Thread Size: Approx. 21mm (0.8in) Applicable Refrigerant: R32, R134A, R407A, R404A, R422A, R422D, R507, R407C, R417A, R437A, R407F Package List 1 x Refrigerant Adapter