cwvlWlanNUcastKeyLen 1.3.6.1.4.1.9.9.268.1.2.2.1.2

This object specifies the length in octets of cwvlWlanNUcastKeyValue. Common values are 5 for 40-bit WEP key and 13 for 128-bit WEP key. A value of '0' means that the key is not set.