- VTR-B: brass boss, threaded pass-through hole, with cap.
- VTR-FP: brass boss, threaded pass-through hole, without cap.
- VTR-N: square hole, without cap.
- VTR-p:zinc-plated steel threaded stud, chamfered flat end according to UNI 947 : ISO 4753 (see Technical data).
Special executions on request
|Black (RAL 9005)||C9|
|Orange (RAL 2004)||C2|