On the SIPA SFR, uneven preform heating is a fast track to rejects and wild swings in bottle weight. When the heating tunnel can’t hold setpoint, you’re chasing scrap and throttling the line back just to stay in control. The gold-coated twin tube for the SFR is a direct-fit drop-in, built to put the heat profile back where it should be. What matters, technically We build the emitter as a gold-coated twin tube, matched to the SFR tunnel geometry and voltage. The gold reflective layer keeps infrared energy focused on the preform wall, so absorption improves and wasted heat drops. You get quick recovery to setpoint after door cycles, stable output over long runs, and repeatable heating from startup to shutdown. Why it works in the real world With this tube in, you can run shorter heating windows without giving up stretch or wall distribution. In practice, that means higher throughput at the same cycle time and fewer rejects from thin spots or stress marks. Energy use falls because the reflector cuts re-radiation loss and the tunnel runs closer to balance. Out in the field, tube life stretches beyond standard halogen quartz, so you burn through fewer spares and spend less time on lamp changes. The practical details Installation is straightforward—just verify connector type, terminal orientation, and mounting clips before you swap. Take it through a ramp-up and confirm your PID tuning; the response is faster, so overly aggressive settings can overshoot. Keep reflectors clean and check alignment after every lamp change. Even a small shift in position moves the hot zone and shows up as inconsistency in the bottle.