Can anyone tell me what why the following text appears right before the meta description for all my pages in SERP:
Items 25 - 100 - Meta Description Text
The site runs on Wordpress with SEO by Yoast.
Google is thinking that you have pagination and is putting in markup for it. To power this functionality, Google appears to look for "items ## to ##" anywhere in your text. You do such text, but not for pagination:
3D printing produces items 25 to 100 times faster
I can find it in your source code in an image alt tag.
It looks like a Google bug. If you want to work around it, you could change that sentence. Try one of the following:
It looks like you may have already updated an article title to "New 3D Printing Technology Produces Parts from Resin 25 to 100 Times Faster" but did not change the alt text on the image to go along with it.
it doesn't appear to be on every page. Try identify what pages it occurs and then try find plugins or things in common. It doesn't seem to appear on post pages, the date is being used there. So it could be the theme inserting it in absence of the post date