FEATURES: 
Steel construction, black  in color
Extra Firm spring tension (12 ounce rate)
Works with standard (upright) or laydown motor brushes
Can be used with most open endbell type motors on the market such as Associated, Reedy, Yokomo, Kyosho, Epic, Trinity etc.

INCLUDES: 
Two motor brush springs

COMMENTS: 
This is installed on the post on the endbell.  The bent side goes to the motor brush and the straighter side goes on top of the brush hood
Also available is a Medium Firm Spring, Firm Spring and Medium Spring