AddOn AM1333D3DRE/4G x1 Lenovo 57Y4138 Compatible Factory Original 4GB DDR3-1333MHz Unbuffered ECC Dual Rank 1.5V 240-pin CL9 UDIMM - 100% compatible and guaranteed to work - TAA Compliance 57Y4138-AM

AddOn AM1333D3DRE/4G x1 Lenovo 57Y4138 Compatible Factory Original 4GB DDR3-1333MHz Unbuffered ECC Dual Rank 1.5V 240-pin CL9 UDIMM - 100% compatible and guaranteed to work - TAA Compliance

ACP-EP Memory is your memory partner with upgrades available for all the latest notebooks, desktops, servers and workstations. All ACP-EP Memory products are manufactured to JEDEC standards, to meet or exceed all OEM specifications.

Technical Specifications:
Memory Size: 4 GB
Memory Technology: DDR3 SDRAM
Memory Speed: 1333 MHz
Error Checking: ECC
Width: 2"
Weight (Approximate): 12 oz
Country of Origin: China