MA4.0-17S. Bayonet inlet, helical static mixer for 50ml and 75ml cartridges.  Stepped outlet that can be cut back to increase orifice size and increase flow rates.  These mixer nozzles are suitable for all two-component materials.  They have white elements and are constructed of high grade polypropylene. 17 elements x 4.0mm ID. 8.16cm long. 0.75ml retained volume.