US$ 29.99
OCN1296SF590 1/2"X 100 Feet English Units
forming a tight seal
They have grooves on the brass side adjacent to the PHENOLIC scale as recommended by API
1-2003 standard
Petroview 4660835 Outer Upper Barrel NAST OCN1296SF590 1/2"X 100 Feet EnglishOuter upper barrel used on the Petroview sampler.