Help on slicing array items

Guys, are you all right?
Guys, I'm new to scripts and I'm trying to store some values in series within each item of an array, however, I get an error when I use the "slice()" method to separate each value.
What am I doing wrong? Can anyone point me in some direction where I can solve this problem?

var arr_maisServicos =[];

var quantidd = 1;
var pefilIDfx = "Pefil xxxxx 000";
var tamanho = "20x30";
var valorSer = 10.00;
var sep = ":";

// COLETA TODOS VOLORES AO CLICAR EM MAIS
arr_maisServicos.push([ Number(quantidd) + sep +  tamanho + sep +   pefilIDfx + sep +  Number(valorSer) ]);
arr_maisServicos.push([ Number(quantidd) + sep +  tamanho + sep +   pefilIDfx + sep +  Number(valorSer) ]);
arr_maisServicos.push([ Number(quantidd) + sep +  tamanho + sep +   pefilIDfx + sep +  Number(valorSer) ]);

adiconar()
function adiconar(){
    for (i = 0; i < arr_maisServicos.length; i++) {   
        servs = arr_maisServicos[i];
        serv1 = servs.split(":")[0];
        serv2 = servs.split(":")[1];
        serv3 = servs.split(":")[2];
        serv4 = servs.split(":")[3];
        }
    
      alert (serv1);
      alert (serv2);
      alert (serv3);
      alert (serv4);
}