Our high quality, Stainless Steel Sample Loop is for the 7725, MXII valves. have burr-free, square-cut ends to ensure a flush connection to valve ports. Stainless steel sample loops are supplied with unswaged fittings. The two ends of the loop must be completely bottomed in the injector ports before the ferrule is swaged onto the loop. This sample loop is available in volumes of 5µL-5mL.