| Business | Phone |
| A-1 Accurate Inc 4065 Remembrance Rd Nw, Grand Rapids 49534 | (616) 791-9092 |
| Accu-Form Metal Products Inc 1701 Broadway Ave Nw, Grand Rapids 49504 | (616) 363-3801 |
| Air Maid Manufacturer 1025 Clancy Ave Ne, Grand Rapids 49503 | (616) 451-3880 |
| Constructive Sheet Metal Inc 1415 Division Ave S, Grand Rapids 49507 | (616) 245-5306 |
| G A Richards Co 1060 Ken O Sha Ind Park Dr Se, Grand Rapids 49508 | (616) 243-2800 |
| Kimbow Inc 1250 Front Ave Nw, Grand Rapids 49504 | (616) 774-4680 |
| Zinger Sheet Metal Co 4055 Stafford Ave Sw, Grand Rapids 49548 | (616) 532-3121 |
| Sparta Sheet Metal 2200 Bristol Ave Nw, Grand Rapids 49544 | (616) 784-9035 |
| Shade Tree Mfg 1615 Monroe Ave Nw, Grand Rapids 49505 | (616) 364-8009 |
| Shade Tree Mfg 2547 3 Mile Rd Nw A, Grand Rapids 49534 | (616) 791-9089 |
| Reliance Spray Mask Co 2825 Northridge Dr Nw, Grand Rapids 49544 | (616) 784-3664 |
| Monarch Metal Mfg Inc 3303 Union Ave Se, Grand Rapids 49548 | (616) 247-0412 |
| Metal Housings Inc 3030 Stafford Ave Sw, Grand Rapids 49548 | (616) 245-4531 |
| Metal Plus Llc 655 Godfrey Ave Sw 3, Grand Rapids 49503 | (616) 459-7587 |