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Browning Diana Grade choke tubes produce tighter patterns than Browning Invector Plus choke tubes.

Features:
- Stainless steel barstock and heat treated prior to machining
- Titanium nitride surface 72RC harness for excellent wear and reduced plastic build-up
- Absolutely perfect concentricity to provide superior patterning

Specifications:
- Choke: Improved Cylinder
- Color: Titanium Nitride, black band
- Constriction (Inches): 0.01
- Gauge: 20 Gauge
- Fit: Fits Browning 12 and 20 gauge back bored Invector Plus barrels, and Browning 28 gauge Standard Invector Barrels.