ceipSecTunOutSaEncryptKeySize 1.3.6.1.4.1.9.9.432.1.1.2.1.27

The key size in bits of the negotiated key to be used with the algorithm denoted by 'ceipSecTunOutSaEncryptAlgo'. For DES and 3DES the key size is respectively 56 and 168. For AES, this will denote the negotiated key size.