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
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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