Product review (3 stars): Make sure you order the correct item
The picture, and product number for this item differ.  I bought the item currently listed on this page "Green Filter for Kenmore 46-9990 NSF Certified Refrigerator Water Filter, Cer..." for $27.97.  A great price since the product specifications give this product number: "SGF-LB60" - which is the version that matches certifications 42 and 53.  A great price.  However the product I received matched the picture, and is Green Filters other model, LB50.  I contacted the seller I bought from, Global Shop Stop and they sent the item I thought I was buying.  Thank you Global Shop Stop.  Is there functionally a difference, I don't know but I've always had the better of the two filter versions and wanted to stick with that.  Both of the green filter products are much less than other options.  If you're expecting the stronger filter, I think the only option is to check the price for the two and pick the higher.  Hopefully GSS will update this page to show the correct Green Filter product number.