Shock Tube Safety Fuse from Japan
A non-explosive plastic tube filled with reactive powder that transmits a low-energy shock wave to initiate detonators remotely. Though technically a signal tube, it's used interchangeably with safety fuses in mining under HTS 3603.10.00.00. Provides minimum run-up distance with high reliability.
Duty Rate — Japan → United States
13%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Differentiate from detonating cord via low-energy signal declaration to Customs
• Require mine site end-user letters for commercial blasting verification
• Color-coded tubes need matching documentation to prevent mix-ups during inspection