Danfoss        
N5   HL IHM metric   HL R5 A5Cyl 1
N5 Series   IHM Series   R5/A5 Series
Heavy Duty NFPA Interchangeable   IHM to ISO 6020/2 DHM to DIN 24 554   NFPA Interchangeable
         
SN5   Cyl G Series   eaton cylinder
SN5 & SHR5 Series   HG Series    Q6 Series
Electronic Feedback    Heavy Duty Large Bore Tie Rod    Non Lube Air
         
HL light duty 1   Cyl W Series   HL T saver 1
 L Series   HW Series   T Saver Series
 Pneumatic Light Duty    Industrial Grade    Pneumatic & Medium Pressure Hydraulic