We are offering fh high precision pg1 type ring cup. Features: 1). Body hardness is over 82hra 2). Little deformation and longer life 3). Less yarn tension variation and end break 4). Better wear resistance and toughness 5). Continuous and stable working 6). Short running period high precision pg ring cup is made of bearing steel material and polished by refiner, the tolerance is about 0.1mm. high precision pg ring cup is processed with increased friction area, less stress, stable yarn tension, and quick heat radiation and special surface treatment to improve wearability and rust proof and friction factor. We can provide various pg ring cups to fit all kinds of spinning machine and textile yarns. Specification of pg type steel ring: pg12, pg1, pg2 normal type:3854, 3851, 4051, 4054, 4254