These variable shielded coil forms are used in making adjustable, tunable inductors, transformers, IFT Coils, oscillators, narrow band RF filters, broadband FR filters. Lodestone hardware is famous for High Q and Superior Temperature Stability. Popular Toko coil sizes 5P, 5K, 5KR, 5PAG, 5PAB, 7KL, 7KLL, 7KM, 7KMM, 7PY, 7PSG, 7P, 10K and 10EZ are available. Coil form hardware, or finished custom coils to match customer specifications.