50g springs from the official Sanwa store in Japan. Engineered to work with any Sanwa button listed on the website. This is the standard spring Included with IIDX lightning model cabinets
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Must have for a IIDX Ligtning Specs
They feel incredible, perfect for replacing the ones that come with stock Gamo2 controllers, or for any IIDX cab.
Pair it with 50g omron switches and you have the perfect controller for IIDX!