Both reviews say 90 degrees. Will it stop a door at about 170 degrees, so knob doesn't hit the wall?

I also used it ar 90 degrees. You Tube videos are very good. The amount of door swing is adjustable. I think it is long enough to allow for 170 deg of swing. The door stops exactly where you set it so the knob will not hit the wall. Only question is if the door opens the full 170 deg.

How many door stops in each package?

There were 2, one for the top and one for the bottom

The installation video says that the ids comes in a 4 1/2 inch size for commercial doors, but i can't find this version on amazon. any suggestions?

There are only 2 styles in the commercial. One is for indoor use (clear plastic) and the other is black and silver carbon fiber that states on label for commercial or residenter exterior doors. We installed the carbon fiber ids on three exterior steel doors in our home last fall. They have held up well under our use. I would suggest that you try them on a few of your doors to see how you feel they might withstand heavier use depending on your situation.

Is the 4" fibre thicker than the 3.5" poly? I had trouble getting the poly behind the hinge.

It can go right in front of the hinge.

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Invisible Doorstop Fiber by Invisible Door Stop MfrPartNo IDS4000CF, Carbon Fiber

Product ID: 64347272

Details

Brand
IDS
Color
Carbon Fiber
Global Trade Identification Number
Manufacturer
Ids Llc
Material
Carbon Fiber
Mounting Type
Door Mount

🏢Commercial grade

🔧Adjustable 60°-160°

🛡️Lifetime warranty

Description

🚪 Stop the Door Drama with Style!

BUILT TO LAST - Crafted from premium carbon fiber, ensuring durability in both residential and commercial settings.
PEACE OF MIND - Comes with a lifetime warranty for worry-free usage.
UNIVERSAL FIT - Designed to fit all standard 4" hinges effortlessly.
SLEEK AESTHETIC - Metallic finish adds a modern touch to any space.
UNMATCHED VERSATILITY - Easily adjustable from 60° to 160° for all your door needs.

The Invisible Doorstop Fiber is a commercial-grade door stop made from durable carbon fiber, designed for both residential and commercial use. It features an adjustable range of 60 to 160 degrees, fits all standard 4" hinges, and comes in a sleek metallic finish. With a lifetime warranty, this door stop combines functionality with modern aesthetics.

Specifications

ASIN	B00V5PMKZM
Best Sellers Rank	#1,561,758 in Office Products ( See Top 100 in Office Products ) #12,539 in Door Stops
Brand Name	IDS
Color	Carbon Fiber
Customer Reviews	3.7 3.7 out of 5 stars (72)
Global Trade Identification Number	00865185000036
Manufacturer	Ids Llc
Manufacturer Part Number	IDS4000CF
Manufacturer Warranty Description	AS LISTED
Material Type	Carbon Fiber
Model Number	IDS4000CF
Mount Type	Door Mount
Number of Pieces	2
Product Style	Adjustable
UPC	865185000036
Unit Count	1 Count

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