Ordering Description Product number Description: Tweco 64EX-60 Conductor Tube Extension (60 DEG) Rigid, No. 3 & 4 Product number: 1640-1312 Description: Tweco 64EX-45 Conductor Tube Extension (45 DEG) Rigid, No. 3 & 4 Product number: 1640-1311 Description: Tweco 64-8EX Conductor Tube Extension (80 DEG) Rigid, No. 3 & 4 Product number: 1640-1303 Description: Tweco 64-6EX Conductor Tube Extension (60 DEG) Rigid, No. 3 & 4 Product number: 1640-1302 Description: Tweco 64-4EX Conductor Tube Extension (45 DEG) Rigid, No. 3 & 4 Product number: 1640-1301