A. 22㎜ Body length
B. Lighting part
   LED and LAMP lighting. Button shape are round, square, rectangle 
   and emergency.
C. Switch part
   Micro switch construction based on spring plate
D. Contact
   Silver and 3㎛ gold plated cross bar contact
E. Terminal
   Common to soldering and terminal contact

SRⓐ-ⓑⓒⓓⓔⓕ
SR : Φ16series

ⓐ : Function ( M:Momentary A:Alternate P:Indicator )
ⓑ : Button shape ( 1:Round 2:Square 3:Rectangle 4:Mushroom(Emergency) )
ⓒ : Lamp voltage / LED ( 0:No lamp, 1:6V, 2:12V, 3:24V, 4:LED )
ⓓ : Button color ( R:Red G:Green Y:Yellow W:White B:Blue )
ⓔ : Fixing ( 1:Snap-in , 2:Screw )
ⓕ : Contact ( 0:No contact, 1:1a1b, 2:2a2b )