The Bykski G1/4 Dual Male Extension Coupler - Mini is useful to adapt a female fitting to a male fitting. The coupler can be used with any G1/4 threaded fitting(s). Features Diamond Knurled Useful for tight corners Specifications Thread: G1/4 Material: Brass Compatibility Loop: Non-Aluminum Included Parts 1x Dual Male G1/4 Extension Coupler - Mini Warnings Not responsible for any damage caused by or when using this product. Use at your own risk.