| Mtundu | Mtundu | Phokoso | Mbale yamkati ya unyolo | Mbale yakunja ya unyolo | Shaft diameter |
| P | h2 | h1 | d2 | ||
| OTIS | T135.7 | 135.7 mm | 5 * 32 mm | 5 * 28mm | 12.7 mm |
| 135.46 mm | 5 * 32 mm | 5 * 28mm | |||
| 135.733 mm | 5 * 32 mm | 5 * 32 mm |
Escalator step unyolo nthawi zambiri amapangidwa ndi zipangizo apamwamba mphamvu kupirira kulemera kwa anthu kuyenda ndi kuyimirira, kuonetsetsa chitetezo ndi kudalirika.