Astrodymium Fine Adjustment Spacer Rings for M42/M48, and M54 Threads

Did the job and did it well

The rings did the job perfectly, got all my accessories lined up like i wanted.

M54 Backfocus Spacers

Very sturdy, rigid and durable material, Can be thrown in a camera case or pocket without concerns of damage or easy loss. But I am curious why the size range and quantity is different for the different diameters. The stacking options don't change and the material and fabrication cost cannot be that different.

Fits exactly as needed! Will be buying from here again.