I want to know the average weight of the 2 or 2.1mm sponges without the rubber cut for the blades.

TIA.

Here is the info you are looking for, you will have to sort through and look only at the 2.0, 2.1 sheets. It is complicated because the sheets are not the same size, so you may want to look at the mass/sq cm column at the right side of the chart.

Have fun.

https://tabletennis-reviews.com/reference/rubber-sheet-mass-size-database/

There's no point knowing this unless you also measure the size of the sheets. Typically Japanese sheets are 1cm longer than ESN sheets, which is why Butterfly sheets and Tibhar Evolution sheets seem to be so heavy. Once you've divided the weight by the area, you get areal density (g per sq. cm) which you can use to compare sheets.

I've got a pretty big database of sheet weights, all based on stuff I've used (and weighed, and measured) myself. Maybe one day I'll post the whole thing. Look under my "training rubbers" thread - quite a bit of info there. Most sheets are "max" because that's all that is available, and I usually don't buy thinner sponge when it is available.

Iskandar

The mass of 2.0 mm sponge sheet (excluding topsheet) will usually vary from 16 to 24 grammes, depending on given sponge density.
Typical sponge density is measured around 0,45 g/cm3 .(not boosted).

/Be happy/

Thanks, I'm looking for Fastarc G-1 but I didin't see in the link.

Go to the link, scroll down to the database, you should see a search bar at the top right side of the database. Just type in Fastarc and you should find what you are looking for.

Got it, many thanks.