Inductors descriptions： We use high-quality raw materials, all materials are very suitable for the product, please rest assured to buy. Shell Skeleton Empty Ferrite Core No Inductor Coil 25-100mhz. Features: This Product is an Adjustable Inductance with Adjustable Magnetic Core. It Belongs to the Inductance of Class. It Has a Wide Range of Applications in Radio Communication. Typical Use in the LC Oscillation Frequency Regulation; Radio Remote Control Transmitter, Coupled Inductors, and So On. Specifications: Ferrite Core Diameter : 3.6mm Ferrite Core Height : 8mm Inductance Without Core : 0.09uH Frequency : 25MHz ~ 100MHz Size: 1.6x0.6x0.5cm/0.63x0.24x0.20inch Quantity: 1 Set/20 Pcs Package Includes: 20 Pcs X Adjustable Inductors . Products number : SOMONO100496