The Invector-Plus tubes are longer choke taper inside and produces patterns with excellent uniform densities. It is set to industry constriction standards and have an excellent patterning. The choke tube is constructed of highly polished, 17-4 stainless steel for the ultimate in performance and durability. Invector-Plus choke tubes fit only Browning shotguns designed for Invector-Plus and are NOT for use in shotguns showing Standard Invector or Invector-DS on the barrel(s).
Specifications:

Type	Flush
Gauge	20 Gauge
Choke Size	Improved Cylinder
Configuration	Invector-Plus
Finish	Stainless
Constriction	.009
Chokes Included	1
Recommended For	30 yds
Material	17-4 Stainless Steel
Approved	Steel,Lead,Non-Tox
Ported	No