Music Box Mainspring from Mexico
High-tension steel mainspring barrel assembly that stores energy for continuous music box playback (18-72 notes). Classified under HTS 9209.99.61.00 as core mechanism part for music boxes. Calibrated for 1-3 minute play duration per wind.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include torque ratings and play duration specs to distinguish from watch/clock springs
• Oil residue common; ensure proper packaging to prevent mechanism corrosion during transit
• Obtain material safety data for high-carbon steel compliance