Building Filters

Quantitative Quality Indicators QQI CX-430
- Manufacturer: Unknown
0.75 inch (19 mm) square shim with circle-cross notch pattern, 0.004 inch (0.10 mm) thickness with a notch depth of 30% of shim thickness.
Münster, Germany
Quantitative quality indicators QQI CX 230
- Manufacturer: Unknown
0.75 inch (19 mm) square shim with circle-cross notch pattern, 0.002 inch (0.05 mm) thickness with a notch depth of 30% of shim thickness. Self adhesive
Münster, Germany
Quantitative Quality Indicators QQI 3C2-234
- Manufacturer: Unknown
0.75 inch (19 mm) square shim, 0.002 inch (0.05 mm) thickness, with three circle notches, depths at 20% (outer), 30% (center), 40% (inner) of shim thickness. Self adhesive.
Münster, Germany
Quantitative Quality Indicators QQI CX4-230
- Manufacturer: Unknown
0.79 inch (20 mm) square shim with four circle-cross notch patterns, to be cut by user into four separate shims. 0.002 inch (0.05 mm) thickness with a notch depth of 30% of shim thickness.
Münster, Germany
