WE BRINGS BRAND NEW AND HIGH QUALITY PRODUCT. EACH ITEM IS TESTED PHYSICALLY AND TECHNICALLY BEFORE SHIPPING. WE REQUEST TO BUYER TO CHECK THE PRODUCT QUALITY, WORKING,FLEX, ETC. BEFORE INSTALLATION. WE ARE NOT RESPONSIBLE FOR ANY DAMAGE AT THE TIME OF INSTALLATION. WE REQUEST TO THE BUYER, DO NOT REMOVE OUR STICKER AND STAMP FROM THE PRODUCT.IF BUYER REMOVE STICKER AND STAMP, THEN PRODUCT WILL NOT BE COVERED UNDER WARRANTY.ONCE THE BUYER HAS INSTALLED THE PRODUCT,THEN IT WILL NOT BE REPLACED.THANKS FOR YOUR COOPERATION.PLEASE SHARE YOUR FEEDBACK.