NiSi JetMag Pro 49MAG 磁吸後蓋

Finally, a back cap that actually stays on thanks to that strong magnetic ring — no more fumbling in my bag. It fits the filter stack perfectly and keeps the glass safe during transport. Simple design, but exactly what I needed.

The magnet on this cap snaps on with a satisfying click, and it stays put on the filter stack even when I shove it into my bag. It’s a simple piece of plastic, but it keeps the rear threads and glass protected without adding bulk.

I usually just toss caps into my bag without thinking, but this one actually stays put thanks to that magnetic connection. The rear of my filter stack feels properly sealed off from dust and scratches during transport, which is exactly what I needed.