The 1911 Plunger Tube Spring is a precision replacement component designed specifically for 1911 pistols. This essential spring ensures proper function of the plunger tube assembly.1911 Plunger Tube Spring (Part #R33PS)Compatible with 1911 pistol platformsReplacement spring componentUPC: 811826025364Perfect for gunsmiths armorer work or DIY maintenance to restore proper function to your 1911 pistol's plunger tube mechanism.