Frame Dia. (mm) C | Cover Dia. (mm) B | Clear Dia. (mm) A | Load-bearing Capacity | Class |
400 | 300 | 270 | Customizable | Customizable |
470 | 400 | 350 | Customizable | Customizable |
570 | 500 | 460 | Customizable | Customizable |
680 | 600 | 550 | Customizable | Customizable |
720 | 650 | 600 | Customizable | Customizable |
780 | 700 | 650 | Customizable | Customizable |
830 | 700 | 650 | Customizable | Customizable |