A thin film of pure formvar resin coats a single hole grid.. Gilder finder grid. F2 Type. 20-30nm thick. Gold. Pack of 50. EMS CF200F2-Au-ET Carbon Support Film, Gilder Finder Grid, F2 Type, 20-30nm Thick, Gold, Pack of 50. Country of Origin : United States. Part Number : 1171D87PK. Pack of : 50.