LTWFITTING Brass 5/16" OD x 1/4" Female NPT Compression Connector Fitting(Pack of 5) Type: Male Compression connector Tube Size:5/16" OD Thread:1/4" Female NPT Package Content : 5 PCS(Include Nut And Ferrule) Materies: BRASS, Net Weight: 23.9g/PC Choosing products dimensions and quantities at column of size and colour seperately,price would be more favorable if choosing wholesale.