Product Features This elbow brass dot air brake fittings set offers you flexible and diverse choices.It includes five commonly used outer diameter sizes to choose from (1/4"OD ×1/8"NPT, 1/4"OD×1/4"NPT, 1/4"OD ×3/8"NPT, 3/8"OD ×3/8"NPT, 3/8"OD×1/4"NPT). Each set features 6 uniform-specification dot air brake fitting,allowing you to freely combine them according to your actual engineering needs. Product Specification: Substance: Brass Color: Golden Size:As picture show Package Quantity: 6PCS Warm Tips: -Please accurately measure the diameter of your pipe first and confirm the required size before placing an order to ensure that the elbow dot brass push to connect perfectly matches your usage needs.