![SPI - 0.4 to 12.5 RA micro m Surface Finish, Nickel, Surface Finish Comparator - 06558225 - MSC Industrial Supply SPI - 0.4 to 12.5 RA micro m Surface Finish, Nickel, Surface Finish Comparator - 06558225 - MSC Industrial Supply](https://cdn.mscdirect.com/global/images/ProductImages/0655822-24.jpg)
SPI - 0.4 to 12.5 RA micro m Surface Finish, Nickel, Surface Finish Comparator - 06558225 - MSC Industrial Supply
INSIZE, 4 Pieces, 125, 320, 520 ,720 uin Roughness - Ra, Surface Roughness Specimen - 463T80|ISR-CSE017 - Grainger
![SPI - 0.1 to 3.2 RA micro m Surface Finish, Nickel, Surface Finish Comparator - 06558266 - MSC Industrial Supply SPI - 0.1 to 3.2 RA micro m Surface Finish, Nickel, Surface Finish Comparator - 06558266 - MSC Industrial Supply](https://cdn.mscdirect.com/global/images/ProductImages/0655826-24.jpg)
SPI - 0.1 to 3.2 RA micro m Surface Finish, Nickel, Surface Finish Comparator - 06558266 - MSC Industrial Supply
![SPI - 0.8 to 100 RA micro m Surface Finish, Nickel, Surface Finish Comparator - 06558258 - MSC Industrial Supply SPI - 0.8 to 100 RA micro m Surface Finish, Nickel, Surface Finish Comparator - 06558258 - MSC Industrial Supply](https://cdn.mscdirect.com/global/images/ProductImages/0655823-11.jpg)
SPI - 0.8 to 100 RA micro m Surface Finish, Nickel, Surface Finish Comparator - 06558258 - MSC Industrial Supply
![Surface Roughness Comparison Sample Block | Surface Roughness Measuring Instruments - Surface Roughness Testers - Aliexpress Surface Roughness Comparison Sample Block | Surface Roughness Measuring Instruments - Surface Roughness Testers - Aliexpress](https://ae01.alicdn.com/kf/S7151be2d5d1940f9943932b6799758f3P.jpg_640x640q90.jpg)
Surface Roughness Comparison Sample Block | Surface Roughness Measuring Instruments - Surface Roughness Testers - Aliexpress
![Max allowed roughness is ra12.5 so i think i dont need a surface roughness tester if i can read from the reflection :) : r/Machinists Max allowed roughness is ra12.5 so i think i dont need a surface roughness tester if i can read from the reflection :) : r/Machinists](https://i.redd.it/2e4fx0abp4361.jpg)
Max allowed roughness is ra12.5 so i think i dont need a surface roughness tester if i can read from the reflection :) : r/Machinists
![How to deal with the surface finish for your precision CNC machine parts. | CNC Precision Machining Service How to deal with the surface finish for your precision CNC machine parts. | CNC Precision Machining Service](https://www.worthyhardware.com/wp-content/uploads/2017/06/5pic.jpg)