| Name | Description |
| FOURWAYPATTERN |
 | Fourway Pattern | |
|
| SINGLEDEFLECTION |
 | Single Deflection | |
|
| DOUBLEDEFLECTION |
 | Double Deflection | |
|
| SIGHTPROOF |
 | Sight Proof | |
|
| EGGCRATE |
 | Egg Crate | |
|
| PERFORATED |
 | Perforated | |
|
| LOUVERED |
 | Louvered | |
|
| OTHER |
 | (other) | Value is not listed. |
|
| NOTKNOWN |
 | (unknown) | Value is unknown. |
|
| UNSET |
 | (unset) | Value has not been specified. |
|