https://www.fleet-products.ca/110570-genuine-control-line-valve-for-dollies-turnable-axles/
110570 | *Genuine* Control Line Valve for Dollies & Turnable Axles
110570 control line valve with 3/8" and 1/2" ports, balanced dolly signal for trailers. Replaces Sealco 110570, Haldex RB000, Meritor RSL110570.
control linegenuinevalvedolliesturnable