* The innovation in choke tubes. The advantages are clear:

100% Titanium – tough and corrosion resistant.
Extended choke tube for better choke performance and easy handling.
Less Weight – lighter than the shorter standard factory choke tube.
High precision machining resulting in optimum choke performance.
Comfortable finger grooves for quick choke changing without wrench.
Existing Krieghoff choke wrench fits Titanium choke tubes
The 12 Ga. Titanium Series fits all K-80, K-20, KX-6, KX-5 & KS-5 12 Gauge Barrels with original factory choke tubes.

Constrictions Available for 12 Gauge Titanium Choke Tubes 00 = CYL = Cylinder 0 = S = Skeet 1 = IC = Improved Cylinder 1+ = LM = Light Modified 2 = M = Modified 2+ = LIM = Light Improved Modified 3 = IM = Improved Modified 4 = F = Full 5 = SF = Super Full Titanium

Krieghoff 12 Gauge Titanium Choke Tubes 3= IM= Improved Modified