If the surface of the whetstone is not flat, the knife cannot be sharpened efficiently.
Since the surface of the whetstone becomes uneven after use, it is a maintenance item 
for the whetstone that is necessary for continuous re-sharpening.

Item description:
Brand: Kai                                                         
Item Name: Flattening Stone 
Part Number: AP0335
Size:
Size: 174×59×32mm
Weight: 450g
Other Details: Material/Material:
Black Silicon Carbide (#220)

Combine Shipping:
Please request invoice when you purchase multiple items. 
Handling Time:
We ship out within 3-5 business days after receiving payment.
Tracking Information:
We provide tracking number once item as shipped.
Customs duty:
Import duties, taxes, and charges are not included in the item price or shipping cost.
These charges are the buyer's responsibility.

Payment:
Various payment methods are available on ebay.
Payment is expected within 7 business days.

About Us:
We are specialized store in Japanese Tool brand.
Please contact us if you have any question.
Ninja Tools - 忍者工具店

How to use "request total option":
Log in to ebay.com (ebay USA). 
use desktop PC , not a tablet or smartphone add items to cart click 
"go to cart" not "go to check out" click "request total"
then, I will send an invoice with combined shipping charge.