4GB Brand Name (4x 1GB) PC2-6400U DDR2 800Mhz 1Rx8 Non-ECC Desktop DIMM MemoryMAKE SURE YOUR SYSTEM WILL SUPPORT THIS RAM 30 DAY WARRANTY Returns will not be honored if the merchandise is altered in any manner; this includes showing signs of use. The merchandise must be returned in its original packaging.FEEDBACK Positive feedback from our customers is critical for the continued success of our business. Feedback from customers has a direct impact on our sales. Ultimately, by leaving positive feedback, you are having a positive effect on the sales of our products..NEW OR USED If for any reason you do not feel that you can provide positive feedback, please let us know in advance, so that we can try to SOLVE the problem prior to feedback and ratings being left.PAYMENTFor your convenience, credit cards and electronic checks are accepted through PayPal.Payment must be received and cleared prior to your merchandise being shipped.Payment is due at the time of purchase.SHIPPINGAll orders are mailed to the Buyer at the address that they have listed on eBay as their Shipping Address. If you would like your order shipped to a different destination, please update eBay with the correct shipping address prior to making your purchase.The Buyer is liable for all shipping and handling charges, eBay and merchant account fees, and re-stocking fees incurred on orders that are undeliverable to the address listed on eBay as the Buyers Shipping Address.The Seller, at their discretion, may elect to use a shipping company other than the one indicated in the listing. The most common shipping companies used by this Seller are the USPS, FedEx.All shipments will receive a tracking number. The tracking number will be updated to eBay and PayPal by the Seller.We proudly support the men & women that serve to protect us, our country and our freedom. We are happy to ship our products to you or your loved ones at APOFPO addresses.At this time we do not offer international shipping. International shipping includes all locations that are not within the USA.CONTACT USPlease do not hesitate to contact US should you have any questions. We will respond promptly to your inquiry.