The E.MC standard rotary valves are 4/3 way, from 1/4" to 1/2" in different styles. The special Style of E.MC rotary valve is the miniature MR432-08/10/15, the seals are made from ceramic, make sure it can be used for long time working E.MC pneumatics & hydraulic also develop special rotary valves according to customers' requirement, for any special rotary valve just send email to us.