9.2.3. A metal plunger holder should be used for transporting B&B plungers, '62' process, and NNPB plungers between the Mould Engineering Department and the Forming Department. The 62 process, and the NNPB plungers must have the plunger coolers correctly fitted in to them and must always be transported together as one unit. The Best Practice is to have one holder on each of the clean and dirty equipment benches in the Forming Department and a suitable quantity of spare holders on the Mould Delivery Truck