5 sizes: 5 different sizes are suitable for the most common pipes, including 1/4'', 5/16'', 3/8'', 1/2'' and 5/8'' (each size 1 piece) Wide range of applications: Can be used to connect thin-walled copper, aluminum and stainless steel pipes in air conditioners or refrigerators Premium Material: Made of spring steel material for flexibility and durability Strong fatigue resistance: Springs can effectively resist fatigue and reduce failure rates under high frequency use High load carrying capacity: Bending springs carry large loads and are suitable for use in heavy-duty equipment Vibration resistance: Silver springs have good vibration resistance and are suitable for high-frequency vibration working environments, Manufacturer: LAXALO