Klein Tools 56056 Fiberglass Fish Tape, 200-Foot Wall Snake is 3/16-Inch Wide Non-Conductive Multi-Groove Fish Tape with 7-Inch Leader

Larger diameter than a metal fish, and you do need to remember it's fibreglass, but works far better than a metal fish in conduit. Highly recommend.

I never knew how valuable this could be until I had to pull cables through a very crowded conduit. Not only did this “snake” it’s way through with ease, but it was strong enough and made Pulling the cable back through a breeze. Would highly recommend it. If you plan on running a lot of cables go for the 200’ version. Since I only needed to go about 50’ and will use it for more residential applications I opted for the 100’. Can’t go wrong. Made life a lot easier and saved me a lot of headaches

I workout with outside conduits that range from small to large or empty and or filled with cables, ect. Been super nice to use and the tip hasn't come off(heard it's a big problem it's most fishtapes), it's a expensive tool but not the most expensive and I'd buy it again for 200 ft length

Works great easy to use.

I purchased a southwire ftsp3-100nct to fish through a 1 inch conduit, 75 foot run with two long sweep 90's at risers and one long sweep 45, 15 feet from one end. After spending 2 + hours trying to get through from both ends I gave up and ordered this one. It arrived at 12 pm, by 12:03 I was done. I AM NOT exaggerating. It was so smooth I had to go see if I was actually done as I thought it too had hung up. I value my time and this would have saved me an awful lot of it if had I purchased it first. Nothing but good things to say.