A thin film of pure formvar resin coats a single hole grid.. Gilder finder grid. F2 Type. Nickel. Pack of 50. . EMS FCF200F2-Ni-EA Formvar/Carbon Support Film, Gilder Finder Grid, F2 Type, 25-50nm Thick Formvar and 1nm Thick Carbon, Nickel, Pack of 50. Country of Origin : United States. Part Number : 1172X66PK. Pack of : 50.