731761-b21 pc3-14900 8gb (1x8gb) 1866mhz cl13 single rank ecc ddr3 sdram 240-pin dimm ram 100% tested working shipment 1) items will be shipped after payment is received. 2) dhl,ups,fedex,or ems is available for shipping. 3) free shipping of charge for china post air mail/hk post air mail for special item.when you chose the shipping method, please ask our seller to change the total charge. 4) delivery time:dhl,ups,fedex,ems express shipping usually take 3- 10 working days and china post air mail/hk post air mail shipping usually take 7-35 days depends on the country delivered to. in rare cases,the strict custom clearances will make the delivery time a bit longer, please be patient. 5) any accidents,delays or other issues are the responsibility of the shipping service. 6).any import charges or fees are the buyer\'s responsibility. 7)please check out your address carefully when processing order. 8)feel free to contact us with any question,we will glad to give you satisfying answer. warranty warranty time: the hdd warranty time is 1 year.if the item is not working, pls let me know the details of failure within 1 year after the receipt of goods.