It's a standard 29" tube with auto 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 29" tires
For tire width (ETRTO size in mm): from 50-622 to 55-622
Valve type: auto (Schrader / AV)
Valve length: 40 mm
: 159 g