A thin film of pure formvar resin coats a single hole grid.. Gilder finder grid. F1 Type. 10nm thick. Gold. Pack of 25. EMS CF200F1-Au-25 Carbon Support Film, Gilder Finder Grid, F1 Type, 10nm Thick, Gold, Pack of 25. Country of Origin : United States. Part Number : 1171F14PK. Pack of : 25.