Description Hammar M2 Manual Op Head. The Hammar M2 Manual Op Head is the front part of the inflation unit. CURRENT STOCK: EXPIRY DATE end 2029. This M2 Op Head is specifically for the Hammar hydrostatic inflator system. The head is used to replace time expired heads. If a complete re-arming kit is needed a CO2 with pre-glued back plate can be ordered here. Hammar M2 Info. NB. The M2 Manual Head is interchangeable with the MA1 Auto Head but it is recommended that you check with your lifejacket manufacturer to make sure that your device has been approved for both manual and auto inflators. Hammar are a Swedish company that make hydrostatic inflation devices. Advice on how to rearm your lifejacket can be found on the link.
