Although similar style feeders exist, there is nothing quite like our Vista Dome. The 8-1/2" diameter tray has a impressive capacity of 1-1/4 quart, and the seed is protected by a generous 12" diameter dome. We have used stainless steel and solid brass hardware that lets you fully adjust the distance between the dome and tray, thus restricting access to the seed by undesirable birds or squirrels. The tray and dome are molded of UV stabilized polycarbonate. The Vista Dome carries a Lifetime Guarantee.