The kit includes two matching 2GB modules of PC3-8500 DDR3 memory designed specifically for Apple's new MacBook 13-inch and MacBook Pro 15-inch models. It costs $140 but you'll get a discount for trading in your current Apple standard memory modules.
The company's trade-in program offers $7.50 cash back per GB of old memory, which is a savings, but not such a good deal considering the new kit costs about $35 per GB. Nonetheless, the memory kit comes with a lifetime warranty and a money-back warranty policy.
Other than the upgrade kit, OWC also offers system memory for all previous Core 2 Duo MacBook and MacBook Pro models, including the still offered MacBook "White" 2.1GHz, in a 4GB DDR2 Memory Upgrade Kit, priced at $69.99.