3M Diffusion Furnace Products, Standard Collar/ Disc Country of Origin: United States

3M Diffusion Furnace Products, Standard Collar/ Disc 2" Thick X 8.5" Inner Diameter X 13.5" Outer...

3M Diffusion Furnace Products, Standard Collar/ Disc 2" Thick X 8.5" Inner Diameter X 10.5" Outer...

3M Diffusion Furnace Products, Standard Collar/ Disc 2" Thick X 8.5" Inner Diameter X 14" Outer D...