Check out Gia Dinh Sports Contact info@giadinhsports.com to get the english questions answered....the web site is www.giadinhsports.com......Dinkalot has bought from them before and I have bought their products from their dealers here in Vietnam...Their dealers do a replacement of product for almost any reason and do it the same day...This is unheard of here in Vietnam where warranty seems to be non-existent...