[Histonet] Which kind of blade carrier?

[Lake, Kim S]

I received approval to order a new microtome (yay!), and we have chosen a Thermo Scientific HM 300 Series Rotary Microtome to replace our Leitz 1512. My question is, which kind of blade carrier should I choose, the E or ER? We use high profile disposable blades. I can't tell from the tiny pictures what the difference is, and a search of histonet didn't help. Anyone have any advice?

Thanks!

Kim Lake, MLS (ASCP)CM
Laboratory Manager
Oral Pathology Laboratory
University of Iowa College of Dentistry