1) ，Solid Cover Series 

* Ductile Iron
* Central Lifting Key Hole
* Cut-Corner Design
* Diamond raised top design 
Some types come with GRP sealing plate.

2) ，Recessed Cover Series

* Ductile Iron
* Lifting Key Holes
* Recessed cover

3) ，Central Lifting Series 

* Ductile Iron
* Central Lifting Key Hole
* Special inscription or different identification
   is available
 

4），Round Cover Series

* Ductile Iron
* Round Cover + Round / Square Frame
* with/without Hinge
* with PE Gasket

Most of the standard sizes are available.