| Model # | External Dimensions | Internal Dimensions |
|---|---|---|
| HP-3660-B | 3.62" x 2.62" x 0.83" 3.622.620.83 | 3.34" x 2.42" x 0.59" |
| HP-3661-B | 3.62" x 2.62" x 1.10" 3.622.621.10 | 3.34" x 2.42" x 0.86" |
| HP-3662-B | 4.41" x 2.62" x 0.83" 4.412.620.83 | 4.13" x 2.42" x 0.59" |
| HP-3663-B | 4.41" x 2.62" x 1.10" 4.412.621.10 | 4.14" x 2.42" x 0.86" |
| HP-3664-B | 5.51" x 2.62" x 1.10" 5.512.621.10 | 5.23" x 2.42" x 0.86" |