Please note that PN KTOS600 is compatible with certain Toshiba models ONLY.  
Please do NOT order this module if your notebook model is not listed in the ff. link: 
KTOS600 model list. 

Specification
RAM type	SDRAM
Form factor	3.3Volts,  Proprietary Design
Storage capacity	256 MB
Technology	SDRAM SODIMM
Access time	PC100
Slot(s) required	1
Data integrity check	Unbuffered non-ECC
Performance	100% Compatibility Guaranteed
Warranty/Service / Support	Lifetime warranty