138CAP – Light Duty Min Pressure Accum. 138CLR – Light Duty V-Belt Driven Curve 138CLRS – Light Duty V-Belt Driven Curve Spur 138CLRSS – Light Duty V-Belt Driven Straight Spur 190CAP – Med Duty Min. Pressure Accum. 190CLR – Medium Duty V-Belt Driven Curve 190CLRS – Medium Duty V-Belt Driven Curve Spur 190CLRSS – Medium Duty V-Belt Straight Spur 190ABE – MD Belt Driven LR Photo Eye 190ZPA – MD Zero Pressure Accum.