SendSize property

Type: Long

Size of outgoing packet (in bytes), including the IP and ICMP headers. The mininum value is 28, and the maximum is 65536. If you specify a value outside this range, HexIcmp will set the value to the minimum or maximum, as appropriate.

If needed, you should set this property before invoking the Ping method. However, this is an advanced property with an appropriate default value (28). You should ignore it unless you know you need it.