Product Overview
The 350×350 mm square SMC composite manhole cover combines high strength with excellent electrical insulation properties. Manufactured from fiberglass reinforced SMC composite material, its non-metallic construction is anti-static, corrosion resistant, and has no recycling value, providing a reliable alternative to traditional cast iron covers.
Product Drawing

Key Features
- High strength SMC material – provides reliable load-bearing performance for small access points
- Anti-static construction – non-metallic material reduces static accumulation and theft risk
- Corrosion resistant – ensures long-term durability in outdoor environments
- Lightweight design – simplifies transportation and installation compared with cast iron covers
Specifications & Dimensions
| Load Class | Clear Opening | Cover Size | Frame Size | Overall Height | Cover Thickness | Weight |
|---|---|---|---|---|---|---|
| A15 | 360x360mm | 400x400mm | 515x515mm | 50mm | 30mm | 10kg |
| B125 | 360x360mm | 400x400mm | 515x515mm | 55mm | 40mm | 15kg |
| C250 | 350x350mm | 400x400mm | 515x515mm | 76mm | 50mm | 21kg |
Technical Specifications:
- Material: SMC Composite
- Clear Opening: 350 × 350 mm
- Load Class: A15 / B125 / C250
- Standard: EN124
- Shape: Square
- Locking System: Two Screw Locks
Applications
A15:
- Pedestrian pathways
- Parks and green spaces
- Bicycle paths
B125:
- Residential sidewalks
- Footpaths
- Light pedestrian areas
C250:
- Kerbside installations
- Residential streets
- Light vehicle access areas
FAQ
What is the clear opening of 350x350mm cover?
The clear opening is 350×350mm for C250 version, and 360×360mm for A15 and B125 versions.
Can you provide OEM / ODM service?
Yes. OEM and ODM services are available. Custom logo, color, surface pattern, and dimensions can be produced according to project requirements.
What is your delivery time?
Normally, the production lead time is about 15–25 days depending on order quantity and product specifications.
What is the MOQ?
MOQ depends on the product size and specifications. Please contact us for detailed information.
What packaging method do you use?
The products are normally packed on export pallets for safer transportation and easier loading and unloading.
Do you provide warranty and after-sales service?
Yes. We provide one-year warranty service and technical support for our products. Please contact us for detailed after-sales information and project assistance.













