| Frame Size | Cover Size | ||
| INCH | MM | INCH | MM |
| 10 * 10 | 250 * 250 | 8 * 8 | 203 * 203 |
| Description | |||
| Square Manhole Cover 10*10 | |||
| Frame Size | Cover Size | ||
| INCH | MM | INCH | MM |
| 12 * 12 | 300 * 300 | 10 * 10 | 250 * 250 |
| Description | |||
| Square Manhole Cover 12*12 | |||
| Frame Size | Cover Size | ||
| INCH | MM | INCH | MM |
| 15 * 15 | 380 * 380 | 12 * 12 | 300 * 300 |
| Description | |||
| Square Manhole Cover 15*15 | |||
| Frame Size | Cover Size | ||
| INCH | MM | INCH | MM |
| 18 * 18 | 470 * 470 | 15 * 15 | 390 * 390 |
| Description | |||
| Square Manhole Cover 18*18 | |||
| Frame Size | Cover Size | ||
| INCH | MM | INCH | MM |
| 21 * 21 | 530 * 530 | 18 * 18 | 450 * 450 |
| Description | |||
| Square Manhole Cover 21*21 | |||
| Frame Size | Cover Size | ||
| INCH | MM | INCH | MM |
| 24*24 | 600*600 | 20*20 | 500*500 |
| Description | |||
| Square Manhole Cover 24*24 | |||
| Frame Size | Cover Size | ||
| INCH | MM | INCH | MM |
| 28*28 | 711*711 | 25*25 | 635*635 |
| Description | |||
| Square Manhole Cover 28*28 | |||
| Frame Size | Cover Size | ||
| INCH | MM | INCH | MM |
| 18x24 | 450*600 | 14*20 | 350*500 |
| Description | |||
| Rectangle Manhole Cover 18"*24" | |||
