Beta Biothane comes in 2 thicknesses, Standard and Super Heavy. They are rated for the same strength.
Standard .10 thickness. I normally use this for bridles, halters, etc. I usually stock this in 1/2", 5/8", and 3/4" widths.
Super Heavy .150" thickness. I normally use this for unpadded breastcollars and reins. It is also preferred by some customers used to the thicker leather used for western tack. I usually stock this in 5/8" and 3/4" widths.
Rein Grip .250" thick with bumps. A type of beta with a softer, grippy feel. Available in 5/8" and 3/4" widths in black and brown.
Quarter Thick .250 Has the same soft grippy feel of Rein Grip without the bumps. My stock on this is usually limited but is available in 5/8 and 3/4 black and brown. I still have some 3/4" blue (matches the royal blue/blueberry beta) I have special made a few years ago.