The page gives a size, 6 by 36 inches, and a nominal wall of .024 inch.
Using it
Stove pipe is a connector, not a chimney. Keep single-wall pipe 18 inches from combustibles unless your manual and code say otherwise, and never run it through a wall or ceiling. Point the crimped end toward the stove.
Questions this guide leaves you with
Is it double wall?
No, it is single wall.
How long is it?
36 inches.
The price on Amazon.com
This model is listed on Amazon.com, at ≈ $41 at the last reading. Listed is not the same as in stock: availability changes daily, and the buy box shows the live price.
At $41, it sits -44 % against the $73 median of the 9 models in this category published here.
Sources
Specifications: the manufacturer sheet for wood heating equipment and the matching Amazon product page. Prices, ratings and availability: read on Amazon.com from a New York address. Every figure on this page names its source.
A European single-wall stove pipe in 2 mm steel, 150 mm (5.91 in) across and 250 mm (9.84 in) long, tested to DIN EN 1856-2 and finished in black Senotherm lacquer. At 150 mm it is a metric size, not the 6 in (152 mm) pipe that most US stoves take.
Diameter
Ø 150 mm (5.91 in), metric; not a 6 in (152.4 mm) US size
The price beside each product is fetched as this page opens, and it is the only figure here that is current. Any amount written into the prose was read once, on the day that sentence was written, and nothing has refreshed it since.