Features:High performance springsExtremely accurate ratesChrome silicon, high stiffness-to-mass ratio, shot-peened, heat-treated and pre-set (no sacking)Specs:Shipping weight: 5.00 lbsShipping size (L x W x H): 13.00 x 4.50 x 4.50 inchesStyle: ShockType: SpringMade in USSold as: EA