Construction typeBlockDatum diameter21.2000 in, 538.48 mmMaterialCast ironNumber of grooves4.0000O.D. (in)21.2000 , 538.48 mm
| Construction type | Block |
| Datum diameter | 21.2000 in, 538.48 mm |
| Material | Cast iron |
| Number of grooves | 4.0000 |
| O.D. (in) | 21.2000 , 538.48 mm |