Product review (3 stars): Fits our Mainline 1900 garburator opening perfectly - nice and snug
Fits our Mainline 1900 garburator opening perfectly - nice and snug.  The downside is that that rubber wedges are a bit on the stiff side.  You've got to push any food through or it just sits on the rubber.  Also, running water will often gather and even start to fill up in the sink even when there's no food sitting on the splash guard - it somehow is oddly difficult for water to flow well through the opening.  Anyway, not too big of a deal.  A bit of a pain but alot better than the old one that was almost fully disintegrated.