Ishihara Test :Labware Material Tech have stocks of 38 & 24 plates Ishihara Test Chart Books, for Color Deficiency:

38 Plates: $130.00/pcs   24 Plates :$100.00/pcs.

The price breaking is
 
Quantity(pcs)      Unit price (USD/pc)
                  
                  38plates    24plates

1                  USD130        100
 
3                  USD120         95
 
10                 USD110         90
 
20                 USD100         80
 
50                 USD90          70
 
>50                USD85          65
  
Regards,
 
Ms. jenny seymoure

Labware Material Technologies

328 E. Weddell Drive Sunnyvale
CA 94089,USA

Phone:1-408-7168509
Fax:  1-408-7169599
skype:xconnector