Samsill® Business Card Binder Refill Sheets are side loading. You insert the cards from the left.
The card holders are side-loading.
Day-Timer® Business Card Holders for Looseleaf Planners are sold in packs of 5.
This business card holder allows for back to back display in their clear vinyal Top Loading pockets. This card holder comes prepunched (seven holes), so it will fit your Daytimer business binder. Daytimer does not list their mil thickness for their card holders. We did contact them and they described it as a durable vinyal and top loading. We hope that this helps, thanks again for your question!
Here is a link to all of our 8 1/2 x 11 Day-Timer Planners.