Does The Itech Recon Full Shield Fit The Reebok Helmet I Just Bought A Reebok 8K Ice Hockey Helmet Large. Itech Recon X200 Full Face Shield It Doesn't Fit It? Why?

I just bought a Reebok 8K ice hockey helmet large. Itech Recon X200 full face shield it doesn't fit it? Why? - does the itech recon full shield fit the reebok helmet

Not all masks, all helmets.

Several online shops with guides on how to "of this parameter is the mask?" And the list of masks and helmets, (s) that do not fit together.