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| Item: | 4 course modular Jackarch and Keystone |
| Part #: | JAM4 |
| Height: | 10-1/4" |
| Thickness: | 4-3/8" |
| Length: | varies |
| Item: | 5 course modular |
| Part #: | JAM5 |
| Height: | 14" |
| Thickness: | 4"* |
| Length: | varies |
| Item: | 4 course oversize |
| Part #: | JAO4 |
| Height: | 12-1/8" |
| Thickness: | 4"* |
| Length: | varies |
| Item: | 5 course oversize |
| Part #: | JAO5 |
| Height: | 15-1/4" |
| Thickness: | 4"* |
| Length: | varies |