I ordered two of each size because I wasn't sure which I needed, anyways, long story short I needed on of each so I have one pair for the front and one pair for the rear.

Here is a link to what they are/do/look like:

Earls Speed Bleeders

Asking $25 shipped for the full set

 

will it fit tt calipers front and gs stck rears?

 

will they fit LS400 (fronts) and SC400 (rears)?

 

They should fit this setup as well as the TT fronts and Gs rears (I'm positive they fit TT fronts and GS rears). The fronts use a 10mm bleeder and the rears use a 7mm bleeder on the Supra setup which I believe is the same for stock Gs brakes as well as across most of the lexus line. If you want to be sure just take a peak at the bleeders on the car now and if the actual threaded portion going into the caliper is larger in the front than rear than these should work for you. You should be able to see them just by looking in between the spoke of the wheel.

 

Still available.