Bostitch 9R189908 Collar (11399-0460002-1)

Does this fit my model?
Does this fit my model?
Collar (11399-0460002-1)
WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm. Some examples of those chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically-treated lumber. Click Here for more information
Toolbarn had the part I couldn't anywhere else. thank you very much. ordering was easy, delivery was slow, but ok. packaging wasn't very efficient. toolbarn placed a 1" dia. plastic ring weighing maybe 1/2 oz. cost $2.99 and put in a 10"x8"x2" box and charged $8.95 shipping. a small bubble envelope and sent USPS. would have perfect!