by Tri-Tronics 

RH-P144AJ/8-30 MW1-UB1-100.

Programable RH Encoder with one output

Also Includes:

2x - MW-1-B 12" circumference measuring wheels (3/8" bore)

1x - MB-UB1 Under-belt counter-weight mounting assembly

1x - C3-3-250 250 ft 3 conductor cable assembly w/ 3 pin connector.