works good for keeping the cardboard dust from accumulating by preventing the cardboard from contacting the rollers keeping it from breaking down. great fit on the inland spools
It's simple but effective and fits well. Ran it just in some pla I had loaded hit print with my normal presets and it came out great. Fit the cardboard spool firm but not hard to get on or off. Not sure what all brands it fit but the advertised inland was dead on