I have turbo ii 9.20.25 bought in 2009 and this attachment doesn't fit at all. i tried both ends.

This step adapter is made for the newer "square" vacs. That is why there is a collar on it. It will work on your vac if you push your hose end past the collar and into the adapter. All attachments for your vac are obsolete.

Can you please provide inside dimensions and outside dimensions for each step?

Each step is slightly tapered, so here is what I measured with calipers for each one, smallest to largest. These are outside diameters at the narrowist point, middle point, and widest point in inches. 1.00, 1.54, 1.94 1.25, 1.29,1.33 1.37, 1.42, 1.46 1.49, 1.50, 1.51 The inside diameter of the smallest step is 0.86 inches. I assume the inside diameter of the others would be slightly less than widest outside diameter of the previous smaller step. Hope this helps.

I need an adapter that has a 35mm female end with a 1 1/4 inch male end to use American vaccum accys. Will this work for that?

This adaptor is 45 mm on the back side(female end) and necks down to 25 mm. (male)It is rubber so it can be cut to fit any size between those two measurements.

Will this work to connect my fein vaccum to cleaning tools/attachments?

If it fits your hose yes, which will depend on the model vacuum you have.

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Description

🔧 Upgrade your dust extraction game—because every detail counts!

COMPACT YET MIGHTY - Lightweight and space-saving at just 1.6 ounces, it fits seamlessly into your toolkit without weighing you down.
BUILT TO LAST UNDER PRESSURE - Crafted from premium materials, this adapter withstands heavy-duty use, ensuring reliability on every job site.
STREAMLINED WORKFLOW BOOSTER - Quick installation and secure connections mean less waiting, more working—perfect for professionals and DIYers alike.
SEAMLESS MULTI TOOL INTEGRATION - Connect your Fein Turbo vacuums effortlessly to a wide range of power tools and attachments for ultimate dust extraction efficiency.
4 STEP DESIGN FOR MAXIMUM VERSATILITY - Switch between multiple cleaning accessories with ease, reducing downtime and boosting productivity.

The Fein 4-Step Adapter (model 31345079010) is a durable, lightweight hose connector designed to enhance compatibility between Fein Turbo Wet/Dry Dust Extractors and various power tools. Featuring a versatile 4-step design, it enables quick, secure accessory changes to optimize dust extraction efficiency for professionals and DIY enthusiasts alike.

Specifications

Manufacturer	Fein
Part Number	31345079010
Item Weight	1.6 ounces
Product Dimensions	2 x 2 x 5.1 inches
Item model number	69908100131
Is Discontinued By Manufacturer	No
Size	size 7.75
Color	Multi-colour
Style	Reducing sleeve
Material	Plastic
Power Source	Hand Powered
Item Package Quantity	1
Number Of Pieces	1
Number of Handles	1
Measurement System	Metric
Included Components	1 x 31345079010
Batteries Included?	No
Batteries Required?	No

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