Blue gauge (low): 2-1/2" diameter, 0-500 PSI Red gauge (high): 2-1/2" diameter, 0-800 PSI Includes 3 color-coded Hoses 43 Long (Red Hose Burst Pressure 4000PSI/MAX working Pressure 800PSI; Blue/Yellow Hose Burst Pressure 3000PSI/MAX working Pressure 600PSI) Ideal for R410A, R134A, R12, R22, R404Z etc. The easiest and most secure way to pay on line.(Other countries or remote areas may take longer). Replace/return are available if buyers receive wrong/damaged/defective items. Anyway, by nice communications, we can find a way to make you satisfied. Ywow is a leading online retailer committed to becoming the most loved and trusted marketplace on the web. With more than hundreds products mainly covering Tools and Improvement/Crafts, Ywow-21 proudly earns the loyalty of tech-enthusiasts and mainstream e-shoppers alike. We equip our customers with state-of-the-art decision-making resources such as detailed product information, "how-to's, " over millions of customer reviews and high-resolution photo galleries.