| Code(s) | Option | Overall dimensions |
| 1800-3000 | W 16" D 16" | W 16" D 16" H 4" |
| 1800-3001 | W 16" D 18" | W 16" D 18" H 4" |
| 1800-3002 | W 18" D 18" | W 18" D 18" H 4" |
| 1800-3003 | W 18" D 20" | W 18" D 20" H 4" |
| 1800-3004 | W 20" D 20" | W 20" D 20" H 4" |
| 1800-3005 | W 20" D 22" | W 20" D 22" H 4" |
| 1800-3006 | W 24" D 20" | W 24" D 20" H 4" |
| 1800-3007 | W 26" D 20" | W 26" D 20" H 4" |
| 1800-3008 | W 28" D 20" | W 28" D 20" H 4" |
| 1800-3009 | W 30" D 20" | W 30" D 20" H 4" |
| Code(s) | Option | Overall dimensions |
| 1800-3000 | W 16" D 16" | W 16" D 16" H 4" |
| 1800-3001 | W 16" D 18" | W 16" D 18" H 4" |
| 1800-3002 | W 18" D 18" | W 18" D 18" H 4" |
| 1800-3003 | W 18" D 20" | W 18" D 20" H 4" |
| 1800-3004 | W 20" D 20" | W 20" D 20" H 4" |
| 1800-3005 | W 20" D 22" | W 20" D 22" H 4" |
| 1800-3006 | W 24" D 20" | W 24" D 20" H 4" |
| 1800-3007 | W 26" D 20" | W 26" D 20" H 4" |
| 1800-3008 | W 28" D 20" | W 28" D 20" H 4" |
| 1800-3009 | W 30" D 20" | W 30" D 20" H 4" |
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