The Acer Aspire E5-551-t7v0 cooling fan from us is brand new,100% compatible with your original laptop cpu fan. Each Acer Aspire E5-551-t7v0 fan should be under strict quality control before leaving the factory, and has passed the authentication of CE, UL, EMC, CQC,ROHS, etc. 30 days money back and 6 months replace warranty.