I currently have 5 sirens available for immediate delivery. they are 9 and 1/2 ish inches tall and the main body is inches in dia. The inlet is 1/2 inch pipe thread. The cowl/horn is roughly 3 3/4 to 4 inches depending on how the casting cleaned up. they weigh about 8 pounds. The "stud" on top has been center drilled in case you would like to drill and tap it for a support bracket.
Price is $550 plus 15 for USPS flat rate shipping within the USA.