Stainless Steel Bearing Type N Handle Knobs - Set of 2 (9-5-3mm, 9-4-4mm) Please refrain from comments requesting discounts. Under the same conditions as standard stainless steel bearings, Stainless Steel Bearing Type N (special retainer) offers a one-rank improvement in rotational performance, casting distance, and smoothness. Although the bearing size changes, using them in handle knobs for baitcasting reels and spinning reels will further enhance smoothness (This varies depending on the viscosity of the oil/grease). Compatible Models: 20 Stella SW All Models 5000HG 5000XG 6000PG 6000HG 6000XG 10000HG 18000HG 20000PG 30000