Kailh Box Springs  -  since April, 2018  
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World Premier Systematic Production  -  Designed & Made by SPRiT 
    
Designed for smoother start and bouncier bottom out 
Supreme 99% Precision  
Made of the best materials from Japan and Korea  -  Custom Ordered
SLOW versions are coming soon in 2020
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V1.2   Actuation Force 
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25g              -  Ultra light, Ultra fast.  World Premier 2018
30g              -  Ultra light, Ultra fast.  World Premier 2018
35g              -  Super light, Super fast.  Since August 2020  Gray Edition
40g              -  Slightly lighter than stock springs. Bottoms out at 50g 
45g              -  Official Actuation force of Kailh stock springs 
 
50g              -  Starts at 38g and bottoms out at 62g 
50g SLOW  -  Starts at 42g and bottoms out at 58g  
52g              -  Limited Edition.  Bottoms out at 65g
55g              -  Starts at 42g and bottoms out at 68g 
55g SLOW  -  Starts at 46g and bottoms out at 64g 
58g              -  Limited Edition.  Bottoms out at 72g 
 
60g              -  Starts at 46g and bottoms out at 74g 
60g SLOW  -  Starts at 50g and bottoms out at 70g 
65g              -  Starts at 50g and bottoms out at 80g 
65g SLOW  -  Starts at 55g and bottoms out at 75g 
 
70g              -  Heavier than Black linear, bottoms out at 90g 
75g              -  Medium heavy, steeper curved, bottoms out at 100g
80g              -  Medium heavy, steeper curved, bottoms out at 108g
90g              -  Starts at 60g and bottoms out at 115g
90 B             -  Starts at 55g and bottoms out at 125g 
 
100g            -  Heavy weighted, bottoms out at 140g  
125g            -  Heavy weighted, bottoms out at 170g 
150g            -  Heavy weighted, bottoms out at 200g 
 
For more details  >   spritdesigns.com/kailh