✅1/16" NPT Aluminum Overflow Nipple Fitting Barb Radiator Universal Under Cap Introducing our high-quality 1/16" NPT Aluminum Overflow Nipple Fitting Barb Radiator Universal Under Cap. This precision-engineered component is essential for optimizing radiator performance and ensuring a secure connection in various fluid systems. Item Feature: Material: Aluiminiun Thread Size: NPT1/16 Color: As the picture shows