These springs will help you customize your typing experience. Different weights of springs will change the amount of force required to press down each key. The springs were tested by keyboard enthusiasts to the perfect weights.
55g are extra light springs. These are lighter than your Cherry Red springs.
55g Slow - Similar to MX Reds with slower curve and stability
60g Slow \\ Extreme - 60g Slow starts at 40g, Better Slower curved than Gateron Yellows. Optimized for the tactiles and linears.
62g - light springs which are similar to Cherry Brown and Red springs
68g are medium springs. Medium springs are right between light and heavy. They have a familiar feel to vintage blacks with a lighter touch
68g Slow - Lighter Vintage blacks feel with slow curve
68g Progressive - Progressive rate version (exponential curved)
72g are heavy springs. They feel very similar to vintage blacks.
78g are extra heavy, and they have a close resemblance to Cherry Clear springs, but they have a softer feedback (by ~25%).