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Fowler 52-720-000-0 Surface Finish Comparator Set 30 Specimens

SURFACE FINISH SPECIMENS: This surface roughness specimen set is ideal for checking, identifying, and specifying the degree of roughness of machine parts.
features 30 different specimens for flat lapping, reaming, grinding, turning, horizontal and vertical milling.
DIMENSIONS: The surface roughness specimens feature grade AA values displayed in microinch and micron values accurate to within ±12% of the nominal values.
each of the 30 specimens made of electro-formed solid nickel is 0.875" by 0.375" in size.
EASY COMPARISON: Each type of surface finish is accurately and consistently reproduced to give the operator a realistic idea of the feel, appearance, and texture of the machined components.
they can be easily compared with a loupe or by utilizing the scratch test.
COST-EFFECTIVE CHECKING: Eliminates costly checking methods, saves time, reduces the production of scrap caused by poor finishes.
SET INCLUDES: This roughness specimen set includes a vinyl wallet and instructions.

Useful assortment: totally 1480 pieces in 1 set, including 4 values frequently used resistors(100, 220, 1k, 10k Ohm), 50 pieces for each.
and 64 values ordinary resistors, 20 pieces for each.
Relative parameters: 68 values, ±1% tolerance, 1/4W, metal film.
Easy to use: each value with individual package and mark, all the resistors were collected in a plastic storage box, attached with a color code guidance, assist with you read the right resistance value.
Bonus: come with a free plastic box, convenient for you to collect and fetch these resistors.
Great compatibility: works well with a wide variety of applications including electronic and electrical experiments.

◆ Professional design, Ultra stable performance.
Illumination system: 8/d（8°/diffused illumination）,specular component included（SCI）.
◆ Display modes: Colorimetric values: L*a*b,L*C*h,△E*ab,XYZ,relative RGB values.
Color difference values: △(L*a*b),△(L*C*h).
◆ Repeatability: Standard deviation within△E*ab*,0.1(condition: measure the white calibration board 30 times for average.
◆ Storage: 100 sets of standard samples.
Measuring conditions: CIE 10° standard observer.

★Professional design, Ultra stable performance.
Illumination system: 8/d（8°/diffused illumination）,specular component included（SCI）.
★Storage: 100 sets of standard samples.
Measuring conditions: CIE 10° standard observer.
★Display modes: Colorimetric values: L*a*b,L*C*h,△E*ab,XYZ,relative RGB values.
Color difference values: △(L*a*b),△(L*C*h).
★Repeatability: Standard deviation within△E*ab*,0.1(condition: measure the white calibration board 30 times for average.

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The Varistor Resistors Values : 5D471K,7D121K,7D241K,7D431K,7D471K,10D121K,10D241K,10D271K,10D331K,10D391K,10D431K,10D471K,14D121K,14D431K,14D471K.
Varistor Voltage: : Choose 15 commonly used voltage and resistance values, including 120V, 240V, 270V, 330V, 390V, 430V, 470V..
Easy to Sort: Each model has a small bag and a mark. Box also has a marked model for easy identification..
Easy to store: Provide a high-quality box for easy management and storage..
More values: Provide 15 commonly used Varistor Resistors values to help you more convenient for protecting equipment against transient voltage spikes.

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Always check can labels for most updated product ingredient values. Some values declared on labels may vary slightly depending on production locations.