High quality Stainless Steel Sample Loops have burr-free, square cut ends to ensure a flush connection to valve ports. It is designed specifically for the 3725 valve. 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. It is available in 2mL, 5mL and 10mL and 20mL volumes.