Yardage- Med. Weight (#3/#4) Invisible
Whether you call this a #3 or #4, it's the same invisible or concealed zipper yardage.
So, yes, your #3 INVISIBLE pulls will fit on my #3 or #4 invisible yardage.
No, your #3 STANDARD COIL pulls will not fit on INVISIBLE tape.
I continue to call my invisible #4 (3.6 across the closed coil) simply because I'm old! We also stock #3 standard coil zipper in yardage & I don't want to send you the wrong thing.
I stock this medium weight invisible zipper as yardage or finished lengths in 98+ colors to match your project.
If you can't put the pulls on, select "Pulls on Tape" & I will put the pulls on for you.
Gently slide the pull down the tape to the length you need & cut it off.
I always add a few inches to each length of zipper tape so I can keep the pull of to the side as I stitch.
Video Help on my youtube channel.