The 41631 is a high impact ABS adapter designed to fit male into 2.5" wire support dust collection hoses such as 61633, 97712, and or 97723 on the large 2.5" end and into 2.25" diameter tank opening common on home shop vacuums, blast gates, and many work stations. It can be used in conjunction with a 61666 to fit male into some recently introduced vacuums equipped with a 2.5" diameter tank opening. Depending on the selection of an appropriate complimentary adapter, hoses at 1.25"; 1.5"; 2" and 2.25" diameter.