The 10x2.5" straight valve tube is purposed for 10x3 tyres. This tube is relatively uncommon amongst the well known makes/models of eScooters in Australia. e-Glide Ultra (subsequently recalled Australian Kingsong X1 Max) adopted this tube for rear (motor) wheel, typically paired with 60/70-6.5 tyre. The Ultra is one of the many Ninebot Max "copy" models, which have tubed operation.
Typical weight 125g.
At 4PSI has internal diameter of 160mm (6.29") making suitable for 6" and 6.5" rims with a tube width of approximately 2.5-2.78".
Nameplate marking JY03 (older version shown in product image has nameplate D05).