| Business | Phone |
| Christensen Fiberglass Llc 126 Aniline Ave N, Holland 49424 | (616) 738-1219 |
| Hamilton Machine & Mold 1261 S Waverly Rd, Holland 49423 | (616) 355-7750 |
| Lotus Corp 13030 Ransom St, Holland 49424 | (616) 399-6444 |
| Tri Tech Tooling Inc 11615 Greenway Dr, Holland 49424 | (616) 396-6000 |
| Par Molds Inc 850 Maple Ave, Holland 49423 | (616) 396-5249 |
| Modern Cnc Technologies 1116 Washington Ave, Holland 49423 | (616) 394-9191 |
| Mold Works 11363 E Lakewood Blvd, Holland 49424 | (616) 396-2322 |