Products list - products impressions

<script>
var dataLayer  = window.dataLayer || [];
dataLayer.push({
  'ecommerce': {
    'currencyCode': 'EUR',
    'impressions': [
     {
        'name': 'iPad Pro',      //name or id required
        'id': 'pad1232',     //name or id required
        'price': '899',
        'brand': 'Apple',
        'category': 'Tablets',
        'variant': 'Space Gray'
        'list': 'Products 2017',
        'position': '1'     },
     {
        'name': 'iPad Air',       //name or id required
        'id': 'pad1332',     //name or id required
        'price': '499',
        'brand': 'Apple',
        'category': 'Tablets',
        'variant': 'Black'
        'list': 'Products 2017',
        'position': '2'     }]
  }
});
</script>