It's a standard 27.5" tube with Presta 40mm length valve. STANDARD - doesn't mean ordinary: quality rubber compound combined with even wall thickness makes ACID tubes reliable and durable. ACID tubes were tested in laboratory!
For 27.5" tires
For tire width (ETRTO size in mm): from 47-584 to 54-584
Valve type: Presta / SV
Valve length: 40 mm
: 159 g