QQI Test Pieces - Standard 6097 QQI Test Pieces - Standard Print 6097 QQI Test Pieces, Standard Quantitative Quality Indicators, also known as notched shims, are magnetic particle test pieces with artificial defects. Verifies the direction and relative strength of magnetic fields. Options: 521048: Standard QQI KSC-430 (CX-430), circle with cross, 30% notch, 0.004” (102µm) shim thickness. CX230P6: Self-adhesive standard QQI KSC-230 (CX-230), circle with cross, 30% notch, 0.004” (102µm) shim thickness. Request for information