Durable PP construction with an internal brush guard to prevent the fill from collapsing and restricting airflow.|The dusting tool end is designed to be compatible with and securely fit traditional ABS commercial compression couplings as found on many commercial extension wands|The fill is replaceable in applications where wear is excessive making it great for clean up on construction sites or capturing fine debris like wall board dust.|Compatible with major brands of central vac with 1.25 inch diameter wands and hose ends