Features: *Pressure Regulation: The 6.5 9 Bar OPV Springs Set serves as an alternative to the factory-set over-pressure valve(OVP) for for Gaggia Classic espresso machines. By replacing the old spring, it allows you to regulate the pressure for optimal espresso extraction. *Optimal Extraction: The factory-set pressure of 15 bar in the for for Gaggia Classic OVP may be too high for classic espresso portafilter baskets. With these replacement springs, you can maintain an industry-standard 9 bar of pressure, ensuring the best extraction results. *Versatile Range: This set includes both 9 bar.5 bar springs, giving you the flexibility to experiment with different pressure profiles and customize your espresso extraction to your preference. *Wide Compatibility: The stainless steel springs in this set are compatible with all newer models of for for Gaggia Classic coffee machines, specifically those from onwards. This ensures easy installation and enhanced pressure control in your machine. *Easy Installation: Replacing the springs in the over-pressure valve is a straightforward process. With the provided step-by-step instructions, you can effortlessly replace the old spring with the desired weaker spring and adjust the pressure according to your taste preferences. Specifications: *Part Name:OPV Springs Set *Material:Stainless Steel *Size:9 Bar/ 6.5 Bar *Color:Silver *Quantity:2pcs Package Content: 2 x Springs Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.