1st order solvent trap i ordered 249$. Threads were not cut deep enough on tube or adapter tube flew off end of my barrel adapter stayed on. 2nd order. One of the 1 threaded spacers. Male threads were no good wouldnt thread all the way on. 3rd order ordered a coupling to attach spacers. Sent me another spacer. Emailed several times no response on any of it User's recommendation: Save your money go somewhere else.