GRIP Hardware Pipe Hardware 1-1/2 Speed-rail receiver to 3/8 female thread Watch this product and we will notify you once it is back in stock. The product is now watched We will notify you once the product is back in stock again. E-mail Watch this product Your personal information is processed in accordance with our privacy policy. 1-1/2 Speed-rail receiver to 3/8 female thread 1-1/2 Speed-rail receiver to 3/8 female threadSteel fitting to 3/8" female thread, used to car 1-1/2" schedule 40 aluminum.