The local store only had three 50/pack boxes of the heavyweight non-glare protectors. I was interested in either 100/Box or 200/Box packs. I appreciated the discount provided me for purchasing the last three 50/pack boxes. PI would bye them again. I did have a few problems opening the protectors in order to slide in pages of printed paper.
While a little thick they are easy to use. I use them for my music and sometimes it is hard to turn the pages with the thicker protectors. But they are more durable.
Trying to get organized to save time! The "open" end of the protector is stuck shut - you have to find a way to jostle the end of the piece and somehow work the two sides of the protector open- very time consuming and annoying. Might not want to buy this unless you have time to burn.