Mica RF Window Disks from Mexico
Circular worked mica disks transparent to radio frequencies used in high-power RF windows for transmitters. Articles of worked mica under HTS 6814.90.00.00.
Duty Rate — Mexico → United States
12.6%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Include RF transmission loss data (<0.1 dB) to prove dielectric properties
• Specify diameter tolerances for waveguide fitting without constituting assemblies
• Avoid metal flanges; flanged windows classify as transmitter parts