This is a Variable Rate Speed Control Valve from Robart.
This is used to vary the rate at which a pneumatic retract functions.
Red anodized aluminum, brushed aluminum, and brass construction.
One variable rate control valve.
One instruction manual.
Assembly onto kit.
Length: 53.3mm (2.099")
Width: 14.3mm (.562")
Overall height: 24.0mm (.946")