1 1/4" All metal rack and pinion focuser in excellent condition. The focuser body is made of steel with a gray/black paint, the drawtube is black anodized aluminum. The focuser has a curved base, and I estimate the curve diameter to be 7" or 8" (but it fit just fine on my 9.5" sonotube).
-Drawtube travel is 2 5/8". Fully extended, the focuser stands
5 1/4" tall.
-The drawtube is lined with Teflon which makes for a very smooth motion.
-The knobs are plastic, but 1 3/8" in diameter.
-Focuser rate is 7/8" per revolution.
-Mounting hardware (machine screws and washers will be included).
Price is $33 Shipped in CONUS.