Choice of available memory sizes for DDR3 UDIMM memory,Choice of single-pack and 25-pack,Reduces corrugated shipping carton materials by 70%,All 25 anti-static ESD plastic bags are eliminated,24 or 25 warranty/safety booklets are eliminated,Quickly open a single 25-pack versus 25 individual cartons,Increased performance over PC3-8500 DDR3-1066 memory,Test-proven 100% compatibility listed for supported systems,Meets stringent Lenovo reliability standards for memory products,Lenovo limited warranty,Lenovo memory installed in a new Lenovo system automatically assumes system warranty