Custom CNC Machined 316 Stainless Steel Sleeve with Plasma Treatment Custom CNC Machined 316 Stainless Steel Cylindrical Sleeve with Plasma Surface Treatment Precision CNC Machining + Plasma Surface Treatment This precision cylindrical sleeve is custom manufactured from 316 stainless steel, featuring a large internal bore, precision cylindrical surfaces, radial mounting holes and drawing-driven dimensional requirements. The part is produced using CNC precision machining,