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General Hardness Comparisons  

 

Shore A 

  20 A

Rubber Band
    30 A

Computer mouse pad
    40 A

Inner tube

    50 A

Pencil eraser
    60 A

Auto tire tread
    70 A

Running shoe sole
    80 A

Leather belt
    90 A

Phone cord / tap washer

  100 A

Skateboard wheel
   

Pipe stem

Shore D

 40 D

Textbook cover
  50 D

Golf ball
  60 D

Office desktop
  70 D

Telephone/ Wooden ruler
  80 D

Computer casing

 

90 D

Bone

 

 

 

 

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