The Bykski G 1/4in. Male/Female Extension Coupler is useful to extend a fitting to allow for clearance and solve other issues. The coupler can be used with any G 1/4in. threaded fitting(s). Features Diamond Knurled Specifications Thread: G 1/4in. Height (with thread): 30mm Height (without thread): 25mm Material: Brass Compatibility Loop: Non-Aluminum Included Parts 1x Male/Female G 1/4in. Extension Coupler Warnings Due to internal finish this part may not be compatible with DI water based coolants and is NOT compatible with PrimoChill Opaque and VUE Coolant Series! Not responsible for any damage caused by or when using this product. Use at your own risk.