This PP-8 push pull valve is built for use in the air brake circuit of a heavy-duty truck or trailer. It lets the operator manually open or shut off the air line with a push-pull knob, giving direct control over that portion of the brake system. It ships one per pack.Interchanges:287418EM55450FeaturesPP-8 push pull valve designSold pack: 1 eachAir Brake Parts categoryTech SpecsType: PP-8 Push Pull ValveSell pack: 1 Each