diff --git a/retailcrm/lib/RetailcrmInventories.php b/retailcrm/lib/RetailcrmInventories.php
new file mode 100644
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+++ b/retailcrm/lib/RetailcrmInventories.php
@@ -0,0 +1,83 @@
+<?php
+/**
+ * MIT License
+ *
+ * Copyright (c) 2021 DIGITAL RETAIL TECHNOLOGIES SL
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * DISCLAIMER
+ *
+ * Do not edit or add to this file if you wish to upgrade PrestaShop to newer
+ * versions in the future. If you wish to customize PrestaShop for your
+ * needs please refer to http://www.prestashop.com for more information.
+ *
+ *  @author    DIGITAL RETAIL TECHNOLOGIES SL <mail@simlachat.com>
+ *  @copyright 2021 DIGITAL RETAIL TECHNOLOGIES SL
+ *  @license   https://opensource.org/licenses/MIT  The MIT License
+ *
+ * Don't forget to prefix your containers with your own identifier
+ * to avoid any conflicts with others containers.
+ */
+
+class RetailcrmInventories
+{
+    /**
+     * @var \RetailcrmProxy|\RetailcrmApiClientV5
+     */
+    public static $api;
+
+    /**
+     * Load stock from retailCRM
+     *
+     * @return mixed
+     */
+    public static function loadStocks()
+    {
+        $page = 1;
+
+        do {
+            $result = self::$api->storeInventories([], $page, 250);
+
+            if (false === $result) {
+                return $result;
+            }
+
+            foreach ($result['offers'] as $offer) {
+                self::setQuantityOffer($offer);
+            }
+
+            $totalPageCount = $result['pagination']['totalPageCount'];
+            ++$page;
+        } while ($page <= $totalPageCount);
+    }
+
+    private static function setQuantityOffer($offer)
+    {
+        if (isset($offer['externalId'])) {
+            $invOffer = explode('#', $offer['externalId']);
+
+            if (isset($invOffer[1])) {
+                StockAvailable::setQuantity($invOffer[0], $invOffer[1], $offer['quantity']);
+            } else {
+                StockAvailable::setQuantity($offer['externalId'], 0, $offer['quantity']);
+            }
+        }
+    }
+}