The Spring Kit supplies the items you require to change the visor locking springs on your G3 helmet. Included are 6 replacements springs (note that only 1 each side it needed leaving you with spares). As well as 2 replacement screws for the centre of each mechanism. 

There are 2 kinds:

the green or blue one which are the same as on your original G3 

the  white one which is strongest and used mainly for high speed and quick move transitions.

How to Replace the Springs in Your Cookie G3 Helmet from Cookie Helmets on Vimeo.