RoHS Straight type AKH 04 00 Applicable tubing O.D. Metric size 04 06 08 10 12 o4 o6 o8 o10 o12 25A Series compatible with secondary batteries Check Valve with One-touch Fittings Series 25A-AKH How to Order . Specifications and dimensions for the 25A-series are the same as standard products. 143