| Catalog Number | Part number | Size |
|---|---|---|
| HEL-...-D-MAXI | 234369 | Grid dimension 66 mm (without connecting plates) |
| HEL-1-D-MAXI | 165083 | Grid dimension 66 mm (without connecting plates) |
| HEL-1-D-MAXI-NPT | 173923 | Grid dimension 66 mm (without connecting plates) |
| HEL-1/2-D-MAXI | 186522 | Grid dimension 66 mm (without connecting plates) |
| HEL-1/2-D-MIDI | 165080 | Grid dimension 55 mm (without connecting plates) |
| HEL-1/2-D-MIDI-NPT | 173920 | Grid dimension 55 mm (without connecting plates) |
| HEL-1/4-D-MIDI | 186521 | Grid dimension 55 mm (without connecting plates) |
| HEL-1/4-D-MINI | 165077 | Grid dimension 40 mm (without connecting plates) |
| HEL-1/4-D-MINI-NPT | 173917 | Grid dimension 40 mm (without connecting plates) |
| HEL-1/8-D-MINI | 165076 | Grid dimension 40 mm (without connecting plates) |
| HEL-1/8-D-MINI-NPT | 173916 | Grid dimension 40 mm (without connecting plates) |
| HEL-3/4-D-MAXI | 165082 | Grid dimension 66 mm (without connecting plates) |