Long-Period Delay Cap from Canada
Detonating cap with extended delay periods (500ms-10s) for specialized underground contour blasting patterns. Provides sequential rock fracture control. Covered by HTS 3603.40.00.00.
Duty Rate — Canada → United States
10.2%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Document exact delay periods for blasting plan approval; temperature range testing required for hot climates; avoid X-ray inspection to prevent initiation