We don't provide free valuation plank, in principle only the free sample of business class provided .

 The company provides three kinds of model slice at most once, each model 2 slices , for you to test its function .Don't resell or install in the produc sales.

Please fill in the blanks the sample model and packing form(apply for sample slice you should fill in three contents of the item information, or the application is invalid and can not be handeled. Thank you)