Sai Systems offers 25mm Square Marked Screw Type Knob. Sai Systems is an ISO 9001:2000 Certified Company. The 25mm Square Marked Screw Type Knob fall in the category of control knobs. The model number of 25mm Square Marked Screw Type Knob is PN 24 and it has a square mark. This is available in all standard colours. The specifications of 25mm Square Marked Screw Type Knob are height: 16mm and shaft diameter: 4.1mm/6.1mm/6.4mm.