Build Vacuum Lifter - BOM sheet parts Question

The link you have on the BOM for this part below takes me to Male not Female ( 4pcs 1/4" Hose Barb to 1/8 NPT Male Brass Quick Coupler Air M Type Fitting Quick-Connect Fitting)

Line 31 - Hose Barb to (1/4" barb to 1/8 NPT Female) Hose to solenoid and hose to brass tee fitting

Is that correct?

I think you may just have “Female” in column B where it should be Male. Drawing page indicates “Male.”
I’ll order where the link takes me for now.

For the Part Line 32 - Barbed Hose Reducer (1/4" to 3/16") Connecting hose to suction cup Amazon 8 $1.75 $14.00

The Amazon Link is * Size: 1/4" to 1/8".

Should the size be changed in your drawings? Or should there be a different Amazon link for 1/4" to 3/16" part?

My apologies, the link is correct but the name is wrong. It should be male as indicated. I have the made the correction in the BOM.

The port on the suction cup is a non-standard size. You get the best fit with a 3/16" barb, but 1/8" works as well.

12V Solenoid to control whether to vent or pull vacuum is not found on Amazon

Here ya go: