Certificate : 1. AAR I--III 2. SGS , RoHS ,MSDS 3. ISO 9001 a leader manufacturer specilized on HDPE slip sheet ,the earliest manufacurer ... -Sheets are sheets of thick plastic with a 3-6 inch lip (referred to as a pull tab) on one or more ... . accept to customize .Certificate : 1. AAR I--III2. SGS , RoHS3. ISO 9001