These look like buttons
I just got mine today and I am giving you my first impressions.  These are WAY smaller than I expected.  They don't feel fragile but I'm not sure if they will work for my water pipe since the hole in my 18.8mm joint slide is fairly large.  I will give an updated review once I try them out this evening.<br /><br />UPDATE 4/23/16:<br />I gave it one more star because they are even easier to clean than the daisy glass screens and more durable (the daisy glass can break easily) but for the price they should have given more.  You can get 200 Daisy screens for around $12 so asking for 20 of these for the price wouldn't be too much to ask.  There is only two screens in the entire bag that will fit my Blaze pipe so if I lose them then I'm screwed.  The other screens are smaller in different sizes and fit perfectly with my other smaller pieces.  All and all I am quite satisfied with the fit, the ease if use, and how well they keep my filler from falling into the pipe.  The water in my pipe is quite clean after a smoking session and they provide excellent air flow.  Maybe they can sell them in sizes as well as the variety pack?
Rating: 4 stars