Glass Lid&tempered Glass Lid

our factory main product tempered glass lid ,the glass lid distribut to our buyer before we will test the performence of the glass lid in according with the country's regulation. 1 impact resistance test put the glass lid on the smooth of the wood,then ues a 0.227kg steel ball impact the glass lid ,only impact one .the glass lid can't be bad . 2 Temperature difference testing put the glass in the oven ,thought 220temperature heat ,then to takr out ,as soon as put the glass in the cold water the glass lid can't be bad. tel:86-0319-8981186 xsghbl at alibaba.com.cn msn: lavender860725 at hotmail.com