Casting Eye Hook MT AND PT Exam Flaw Specimen (Inch Version) Carbon Steel Casting Eye Hook MT AND PT Exam Flaw Specimen Casting Eye Hook Magnetic Particle and Liquid Penetrant Exam Test Flawed Specimens. Geometry: 6" long w/~2" eye. Flaws: 3, randomly placed Standard Tolerance: +/-0.150" (4mm). Documentation: NDT Verification Reports, C of C, CAD Drawings and Test Sheets. Material: Carbon Steel. Customized Calibration Test Block and Flaw Specimen also available.