| 4531 | Solar LED Warning Lights - Long | |
| 4532 | Static Monitors | |
| 4533 | Silt Fence | |
| 4534 | S Series Voltage Stabilizer | |
| 4535 | Schneider Molded Case Circuit Breakers | |
| 4536 | Schneider Contactors | |
| 4537 | Schneider Miniature Circuit Breakers | |
| 4538 | Super Drill Machine SD-1M | |
| 4539 | Super Drill Machine EDM-DR | |
| 4540 | Super Drill Machine EDB-435F | |
| 4541 | Super Drill Machine ED-1 | |
| 4542 | Soft Starters | |
| 4543 | SINAMICS G110 Series Frequency Inverter | |
| 4544 | SM-1711 Sliding Mortise Locks | |
| 4545 | SM-1105 Cylinder Mortise Lock | |
| 4546 | Special Bolts | |
| 4547 | Supply and maintenance for drive and control systems for blast doors | |
| 4548 | Self Closing Spring Hinges | |
| 4549 | Spiral Coolant Hole | |
| 4550 | Solid Carbide Rods | |
| 4551 | Single And Double Straight Coolant Hole | |
| 4552 | Swallow Brand Wire Nails | |
| 4553 | Steel Deformed Bar | |
| 4554 | Stretch-Wrapping Machines | |
| 4555 | Steel Strapping Bands | |
| 4556 | Spray Paints | |
| 4557 | Silt Fences | |
| 4558 | Shrinking Machines | |
| 4559 | Semi-Auto PP Bands | |
| 4560 | Sealing Machines | |