| Y1110A1PC19 | Compression helical spring | WABCO | | |
| Y1110A1PC5 | Diaphragm follower | WABCO | | |
| Y1110B1PC19 | Compression helical spring | WABCO | | |
| Y1110B1PC5 | Diaphragm follower | WABCO | | |
| Y1111A1PC10 | Dust and moisture seal boot | WABCO | | |
| Y1111A1PC16 | Compression helical spring | WABCO | | |
| Y1111A1PC18 | Controlai diaphragm | WABCO | | |
| Y1111A1PC20 | Compression helical spring | WABCO | | |
| Y1111B1PC10 | Dust and moisture seal boot | WABCO | | |
| Y1111C1PC16 | Compression helical spring | WABCO | | |
| Y1111C1PC18 | Controlai diaphragm | WABCO | | |
| Y1111C1PC20 | Compression helical spring | WABCO | | |