Overview Product Description Port Config: Female Diameter: 31.5mm Port Size: 1/4" Length: 81mm Mounting Thread: M16 x 1.5 Valve Height: 45mm Suits: Walker Alpha Series Product Videos Custom Field Product Reviews Write a Review Write a Review × UMADV500-GN16 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *