a: Locating ring; b: essential plate (prime plate); c: information pin; d: insulation plate (for larger mould temperatures or hot runner mildew); e: fasten screw; f: body plate /A plate ( cavity if created in reliable), see below photograph black impurities are apparent within the surface area from the https://plastic-mould33221.bloggactivo.com/19422648/plastic-mould-things-to-know-before-you-buy