Black Wet/Dry Adapter/Hose End to fit into the 2 1/2" Inlet on a Wet/Dry vacuum when using a 1 1/4" hose. This 2 1/2" hose end is the same size as the standard large diameter wet/dry utility vacuum hose so it fits into the vacuum the same.
Black Wet/Dry Attachment Adapter to fit on a 2 1/2" large diameter hose or wand for using 1 1/4" small diameter attachments. This 2 1/2" adapter is the same size as the standard large diameter wet/dry utility vacuum attachments that fit on the hose and wands.
This black large diameter Wet/Dry Hose Coupler is designed to couple two 2 1/2" hoses together to have a longer reach with the attachments. This is the standard large diameter wet/dry utility vacuum size.