Yes, Elbert; I;ve purchased two at Castillo's Hardward.

My experiences are they work well, the hummingbirds catch on quick and then start to guard them by perching nearby.

mine were taken over by bee's so i took it down for a couple months.
just put it back this morning,, we'll see,,,

I HAD bees invade for about a week. Didn't seem to keep the birds away. Then one day they were gone.
There is a world wide problem with bees dying off. Last Wednesday night at the Lions Den there were several bees on the floor dying.
If we don't have bees we don't have pollination. bummer1

Yep thanks Harriette, Castio Hardware has em and now i do.
here hummer hummer here hummer....hummmmm, i guess it takes a while for them to catch on.

another little thing i learned,, to 'force' them to the hole i am aimed at, i stick a toothpick in all the others.
if not, they always seem to go to the one thats hidden the most.