Strike Industries Recoil Spring for Glock pistols allows you to fine tune the timing and recoil. Constructed and wound from 17-7ph stainless steel flat wire, the recoil spring is for reliability and longevity. This recoil spring is 13 lbs.
Specifications:

Type	Recoil Spring
Model	Glock
Dimensions
Size	13 lbs
Material	17-7 Stainless Steel
Action
Trigger
Safety
Thread Pattern
Finish	Stainless Steel
Bolt Type
Hand
Hammer Type
Max Capacity