Hey there! If you're setting up a pellet stove or need to replace your chimney piping, this DuraVent PelletVent Pro straight length is exactly what you need. It's a solid 36-inch stainless steel pipe that's perfect for both vertical and horizontal installations - super versatile for whatever setup you're working with. The cool thing about this pipe is it's got that durable twist-lock construction that makes installation a breeze while keeping everything sealed up tight. Inside you've got 444 stainless steel that's laser-welded (not just spot welded!) so it'll handle the heat without any issues. The outer wall is galvalume steel that comes in either black or the natural finish. What's really handy is you only need 1-inch clearance to combustible materials, which gives you more flexibility in tight spaces. When you're measuring for installation, just remember the actual installed length is about 1.5 inches shorter than the pipe itself. This bad boy works great with biofuels, oil, and wood pellets - basically all the common pellet stove fuels. The inner diameter is exactly 3 inches, and the overall pipe diameter adds about 5/8 inch to that. It's UL listed for both the US and Canada, so you know it meets all the safety standards. Whether you're a DIY enthusiast or a pro installer, this pipe makes the job way easier with that perfect fit construction that eliminates leaks and makes connections simple. No more struggling with poorly fitting chimney pipes that don't lock together right!