Absorber type:
E - Emulsion type.
D - Monotube with Internal reservoir.
P - Monotube with "Piggy back" reservoir.
H - Monotube with Hose mounted reservoir.
W - Shock absorber delivered without spring.
K - Emulsion type for cruiser bikes.
Q - Progressive damping system with two
pistons (PDS)

Adjustment features:
X - High and Low speed compression
damping.
C - Compression damping.
R - Rebound damping.
S - Hose mounted hydraulic spring preload.
L - Adjustable Length.
B - Integrated hydraulic spring preload.
Mechanical spring preload