18% is factory, 20% matches beautifully. I do all my own tinting, have for years, I don't recommend it as it is very hard to get right, but if you trust yourself, you can pick up pre-cut tint for $25 for the fronts.

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2005 Ranger FX4
Green with matching A.R.E. bed cover / Buggman LED Oval and Black with chrome Emblems.
Pioneer Premiere FH-P800BT DD Head Unit / Rockford Fosgate P500-1BD Amp / Rockford Fosgate P2D412 Sub
Keys/Shackles Lift (2") / PA Body Lift (3") / Bilstein 5100's
Mickey Thompson Classic Lock / BFG AT's 285 75 R16 (32.8)