Stack Fortiswitch

Could someone tell me if FortiSwitches 124E-POE are stackable or not? I mean, I'd like to create an LACP with 1 port on first switch and 1 port on second switch. Could I do that or not for Fortiswitch124E-POE (and in case what are the supported models)?

Note That i want to stack these switch without integrate it with fortigate, only stack between fortiswitch   Thanks in advance