| Parameter | Description |
| Part Number | 3B8921 |
| Product Name | Roller Assembly |
| Brand | Caterpillar |
| Product Type | Track Roller Assembly |
| Material | High-strength forged steel with precision machining |
| Strength & Performance | Provides reliable support and long service life in bulldozer applications |
| Surface Treatment / Protection | Wear-resistant and anti-corrosion coating |
| Dimensions & Structure | OEM standard configuration |
| Function / Installation Position | Undercarriage track roller position |
| Operating Conditions | Bulldozer heavy-duty mining and construction operation |
| Compatible Models | D7F, D7G |
| System | Undercarriage system |
| Weight | 1.2 kg |
| Packaging | Wooden pallet + export standard packaging |
| Lead Time | 30–90 days |
| Shipping Method | Sea freight recommended |
| Payment Method | USD / RMB / RUB |
| Warranty | 6 months |
