4GB (2 x 2GB) PC2-5300 667MHz 200 pin DDR2 Non-ECC SO-DIMM.
 
Warranty: Lifetime

Memory expert since 1990. All parts are tested and guaranteed compatible.

No hassle exchanges.Brand name parts only- No unknown and overclocked parts.

Quick shipping.

Guaranteed and tested. 100% compatible with many systems including but not limited to :

Lenovo ThinkPad R60

Lenovo ThinkPad R60e

Lenovo ThinkPad R61

Lenovo ThinkPad R61e

Lenovo ThinkPad R61i

Lenovo ThinkPad Z61e

Lenovo ThinkPad Z61m

Lenovo ThinkPad Z61p

Lenovo ThinkPad Z61t