| Model | Type | Steps | Dimensions | Weight |
|---|---|---|---|---|
| OPB1003 | 3way | One | 275x78x85 | 500g |
| OPB1005 | 5way | 370x78x85 | 550g | |
| OPB1007 | 7way | 430x78x85 | 600g | |
| OPB1009 | 9way | 490x78x85 | 650g | |
| OPB1011 | 11way | 550x78x85 | 700g | |
| OPB1014 | 14way | 558x78x85 | 750g | |
| OPB2003 | 3way | Two | 275x78x85 | 500g |
| OPB2005 | 5way | 370x78x85 | 550g | |
| OPB2007 | 7way | 430x78x85 | 600g | |
| OPB2009 | 9way | 490x78x85 | 650g | |
| OPB2011 | 11way | 550x78x85 | 700g | |
| OPB2014 | 14way | 558x78x85 | 750g |