| 4087 | STIHL SR420 Power Mistblower Chemical Sprayer | |
| 4088 | Steam Cleaners | |
| 4089 | Spray Extraction Machines | |
| 4090 | Stainless Steel Heavy Duty Recessed Manhole Cover & Frame | |
| 4091 | Single-Disc Machines | |
| 4092 | Stainless Steel Medium Duty Recessed Manhole Cover & Frame | |
| 4094 | Scrubber dryers | |
| 4096 | Stainless Steel Light Duty Recessed Manhole Cover & Frame | |
| 4098 | Solid Rubber Bumper | |
| 4104 | Segmental Block Wall | |
| 4105 | Segmental Wall Development | |
| 4106 | Slope Stability | |
| 4107 | Slope Rehabilitation | |
| 4108 | Soil Guniting | |
| 4109 | Slope Repair | |
| 4110 | Soil Nailing | |