For Chevrolet Sbc 327 350 400 Valve Springs Kit W/ Steel Retainers Locks

100% Brand New,never been use Valve Spring Specs: Max Lift: .550" Type: Single W/ Damper Valve Material: Chrome Silicon Spring Diameter: 1.250" Installed Height: 110# @ 1.700" Open Load: 285# @ 1.210" Retainer Specs: Lock Angle: 7 degree Material: 4140 chrome moly steel Notes: heat treated; black oxide finish Lock Specs: Groove: Single; square Notes: heat treated Professional Installation is Highly Recommended (No Instruction Included). Package includes: Just as piactures shown ? Fitment: This listing is for (1) complete set of valve springs for GEN I and II Small Block Chevy (not for vortec) engines. Includes chrome moly steel retainers and heat treated locks.