Summary I am in no way advertising for this brand of film, if fact i think it is a horrible film but I'm stuck with it and thats the way it is. This film causes endless troubles with the first layer beading up and turning into a little nest around the nozzle, but if you manage to get the first layer to stick it works well. The ID on this roller is .35" and will fit on the threaded rod provided with the Anet A8. the hole in my Solutech film measures 2.26"ish and this snaps into it very tight, its hard to remove, in fact.