VW 1600 Based Type 1, 2 And 3 Grant Piston Ring Sets For 85.5, 87, 90.5, 92, And 94mm With Cast Top Ring. Made in the USA. Contain compression rings are manufactured to precision specs from high grade grey iron castings. The top compression rings are black phosphate coated and beveled on the inside top and are relieved on the lower ridge for oil scraping. The second compression ring is a scraper ring used in the second groove. The oil rings are 3-piece circumferential style, that provides quick seating. Sold in complete engine sets.