Detectable Saddle Support Mounting Base, Detectable Blue Polypropylene, Length of 17.02mm (0.67 Inches), Width of 11.1mm (0.43 Inches), Height of 8.38mm (0.33 Inches), Screw Mounting Method, #6 Pan Head Screw, Mounting Hole Size of 3.8mm (0.15 Inches)