Check the listing for details. 1911 Full & Commander Hammer Main Spring 15 16 17 18 19 20 21 23 25 26 28 30 34. Color: Black, Condition: New. Listed at 8.00 USD. Brand New WOLFF Made in USA Springs. May not ship in original packaging. For your 1911 1911A1 Full Size, Commander Series and Delta Elite Your choice of :15, 16, 17, 18, 19, 20, 21, 23, 25, 26, 30 or 34 Pound Mainspring/Hammer Springs Price is for One (1) Spring. Save BIG when you buy more than one! For use in:1911, 1911A1, 1991 Government, MKIV, Gold Cup, & Commander in .45 ACP , Super .38/9mm calibers and Delta Elite 10mm.Hammer springs are available in a variety of weights to allow adjustment of the trigger/let-off to individual needs. Reduced Power 15, 16, 17, 18, 19, 20 & 21 Lb.Factory Standard 23 Lb.Extra Power 25, 26, 28, 30, 34 Lb.Wolff Springs are superb! FREE SHIPPING! Usually ships same or next day. USA Addresses onlyBrand New WOLFF Made in USA Springs. May not ship in original packaging. For your 1911 1911A1 Full Size, Commander Series and Delta Elite Your choice of :15, 16, 17, 18, 19, 20, 21, 23, 25, 26, 30 or 34 Pound Mainspring/Hammer Springs Price is for One (1) Spring. Save BIG when you buy more than one! For use in:1911, 1911A1, 1991 Government, MKIV, Gold Cup, & Commander in .45 ACP , Super .38/9mm calibers and Delta Elite 10mm.Hammer springs are available in a variety of weights to allow adjustment of the trigger/let-off to individual needs. Reduced Power 15, 16, 17, 18, 19, 20 & 21 Lb.Factory Standard 23 Lb.Extra Power 25, 26, 28, 30, 34 Lb.Wolff Springs are superb! FREE SHIPPING! Usually ships same or next day. USA Addresses only