These began life as Sterling style 8X10 holders for glass plates or film if you had the sheath's. There are no sheaths but someone has put glass or plastic sheets in a couple of them to raise the plane for film perhaps, Me not know. Most have the "Sterling" light trap shaved off so they would lay flat in regular style 8X10 backs. I got them with the Korona Gundlach outfit I've got listed here also but it isn't Sterling so regular 810 holders will fit that when someone gets it. There are 6 good dark slides and a LOT of good potential for you guys who enjoy restoring wood things to their former usefulness. Shipping is a known at $18.40. They fit into a flat rate medium box. So let's say $40 total includes shipping and I'll try to keep a little over $20 bucks for these babies to offset my original costs. $40