Danfoss Stroke limiter for TWA-Q & AB-QM 4.0/AB-PM — accessory / spare for the Danfoss hydronic-balancing range. Stroke limiter for the TWA-Q thermal actuator and AB-QM 4.0 / AB-PM valves — clips into the actuator/valve interface to cap the maximum stroke, capping the maximum flow through the valve as a mechanical override of the presetting. Net weight 0.018 Kilogram. OEM P/N 003Z1239. EAN 5714279051193. Technical data quoted verbatim from store.danfoss.com (code 003Z1239).