SK  synchro knee tilt control mechanism 24/7  24 hours up to 400 lbs
PS  multi/task control mechanism TS  task control mechanism
QR  multi/task control mechanism SL  single lever control mechanism
GT  multi/task control mech. for small chairs ST  synchro tilt control mechanism
KT  knee tilt control mechanism GS  pneumatic tilter control mechanism
SK   synchro knee tilt control mechanism 
SK SS AB   + + +   + + + +
PS   multi-task control mechanism 
PS   +   +   + + + +
PS SS   + + +   + + + +
QR   multi-task control mechanism

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QR +   + + + + +  
QR SS +   + + + + + +  
QR AB   +   + + + + +  
QR AB SS   + + + + + + +  
GT   multi-task control mechanism for small chairs                                               top
GT +     +   + + +  
GT SS +   + +   + + +  
KT   knee tilt control mechanism

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KT(t)       + + + + +  
KT +     + + + + +  
KT SS +   + + + + + +  
KT AB   +   + + + + +  
KT AB SS   + + + + + + +  
24/7   24 hours up to 400 lbs

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24/7 AB SS   + + +   + + +
TS   task control mechanism

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TS

+   + + +    
TS SS +   + + + +      
SL   single lever control mechanism

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SL       +          
ST   synchro tilt control mechanism

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ST       +   +      
GS   pneumatic tilter control mechanism

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GS 1/1
ration
      +   +      
GS 1/2 ration       +   +