YSM series connector it's the ideal product of a new generation to replace the old Y series connectors.the size of YSM series include 21mm，28mm，36mm,different size has different poles.YSM series circular connectors are widely used in line connections between electrical equipment，various instfuments and meters,these connectors have the features of small volume，light weight，convenient application，high durability of plug and unplug，high conductivity and high dielectric strength good sealing and water proof performance.