The Signature Series of Winchester Invector Plus choke tubes extended length, combined with perfected choke tapers create a consistent, reliable, uniform pattern at each constriction. Signature Series tubes are available in full range of constrictions for optimizing your pattern for the game or target you are shooting.
Specifications:

Type	Extended
Gauge	12 Gauge
Choke Size	Improved Cylinder
Configuration	Invector-Plus
Finish	Stainless
Constriction	.010
Chokes Included	1
Recommended For	30 yds
Material	17-4 Stainless Steel
Approved	Steel,Lead,Non-Tox
Ported	No