The Bykski Rigid 14mm OD Fitting V2 is used for 14mm outside diameter rigid tubing. This fitting allows you to connect tubing to G 1/4 thread fitting ports securely. Features G 1/4in. Thread Specifications Model: B-HTJV2-L14 Brand: Bykski Compatibility Loop: Non-Aluminum Compatible Tube: 14mm Outside Diameter (PETG/Acrylic/Metal) Parts Included 1x Bykski Rigid 14mm OD Fitting V2 Warnings Not responsible for any damage caused by or when using this product.