EXTENDED CHOKE WITH DIAGONALLY-PORTED DESIGN FOR RECOIL REDUCTION. CONICAL/PARALLEL INTERNAL CONFIGURATION.
EASY TO INSTALL AND REMOVE WITH YOUR FINGERS. NO SPECIAL WRENCH OR TOOL REQUIRED. 
FITS BARRELS WITH PRO BORE STYLE THREADS. ALL PRO BORE BARRELS ARE THREADED AT THE END OF THE BARREL.
REMINGTON HAS MULTIPLE THREAD SYSTEMS THAT ARE NOT INTERCHANGEABLE. 
PROBORE CHOKES FIT:
REMINGTON VERSAMAX
REMINGTON 105CTI
REMINGTON 1100 G3
REMINGTON PREMIER (STS, FIELD, UPLAND)
IF YOUR SHOTGUN BARREL HAS RECESSED CHOKES (IE 870, 887, 1100 & 11-87 MODELS), YOU WILL NEED REMINGTON STYLE CHOKES. 
THIS THREAD STYLE DOES NOT FIT THE REMINGTON SPR SHOTGUNS

OVERALL LENGTH: 3 9/16"
PORTED SECTION LENGTH: 1 1/2"
IN-BARREL LENGTH: 2 1/16"
STANDARD BORE SIZE: .735"
MATERIAL: 17 - 4 STAINLESS STEEL