A polishing jig 10 includes a holding member 11 for holding a ferrule 31 when polishing a front end face of the ferrule 31. The casing has a receiving space and at least one opening, the electronic data storage device is plugged into the opening, the cap is coupled with the casing, and the cap covers up the receiving space. The configuration of the ramp region channels a golf ball to the ball-seating region when the singulation arm is in its delivery position. As the cooling garment receives the liquid refrigerant from the pressurized source, the liquid refrigerant thermally contacts the heat transfer fluid and evaporates, thereby reducing the temperature of the heat transfer fluid.