Well I bought some from the ebay supplier
I've never seen traffolyte in the flesh so to speak before
the smaller bits he does in 3mm are what I imagined ( material that the large hotel key fobs are made of) hard and rigid
the larger bits are 1.5 mm thick and floppy
if i scratch the 3mm thickness with a stanley at 90 degrees the blade scratches... on the 1.5mm it glides..material is soft and plasticky

The seller says they both traffolite but the thinner is easier to bend

any ideas?