This is a part manufactured by Trelleborg, a Swedish company that specializes in industrial and mechanical products. This specific part is a molded rubber or plastic element rated IP55, RAL 9005, UL94 V-0 for long lasting use in extreme conditions. It has a high rating for protection against dust, dirt, and moisture, making it preferable for use in harsh environmental conditions. The UL94 V-0 rating indicates that the material used has passed flammability tests and is fire resistant when exposed to heat and flame.