<app-select *ngIf="productsList.products[i]?.units?.size > 1"
                        class="unit"
                        [(ngModel)]="productsList.products[i].unitId"
                        (ngModelChange)="productsList.unitConverter(i);">

                <app-option *ngFor="let el of productsList.products[i].units | iterableToArray"
                            [value]="el[0]">

                    {{el[1].auxiliaryUnit}}

                </app-option>
            </app-select>