This is a variable Econo 510 control kit from Robart for any pnuematic-operated retracts with air up and spring down operation. This can be used with either a 3-gear ot 2-gear setup. The air control kit comes with everything he/she will need to complete any of the Robart Economy Retract Setups. INCLUDES: 1 instruction sheet 1 variable control valve ROBQ2386 3 Tee fittings-nylon 1 air fill valve 5ft of orange tubing 1 Fill valve 1 small tank SPECS: Air control valve length: 2" (51mm) width: 1/2" (13mm) COMMENTS: This kit will work with any manufacturer"s pneumatic retracts. For the valve service rebuild kit, use ROBQ0196. mcw 7/12/05 ir/jxs