CASTECK DIE CASTING CO LTD, an Exporter specializing in aluminum die‑cast components such as engine housings, isolators and mounting brackets, maintains a highly repeatable trade pattern with a single major buyer, QONTROL DEVICES INC, across the past three years. Shipments average one container per month (≈1 TEU) from Taiwan’s Kaohsiung (58309) or Taipei (58304) ports, consistently arriving at Los Angeles (2704) or Long Beach (2709) terminals, using HS Codes 842691 (and occasionally 830230). Weight per dispatch ranges from 800 kg to over 4 t, showing modest volume growth and occasional larger loads (e.g., 19 t in Apr 2021). For buyers, this reflects a reliable, single‑source supplier with stable supply cadence, predictable product specifications, and a clear upward trend in order size, reducing sourcing risk. For customs brokers, the uniform HS coding, fixed loading/unloading ports and regular documentation streamline clearance, yielding high predictability and low compliance variance, which encourages efficient processing and lower chances of inspection delays.