The treads are sold individually.
The easiest way is going to be to sand it off.
This tread comes with 1" bullnose on the front.
Hi Jake, Thank you for your inquiry regarding Stairtek 1 in. x 11-1/2 in. x 42 in. Unfinished Hickory Box Tread. All of our products are supplied by vendors and prices are discussed and provided by them. I hope this helps. We appreciate your business and look forward to serving you in the future. Thank you for shopping with us! -The Home Depot-
They are ready to stain but I will recommend to sand them any way wit 220 grit before staining
No, it is not recommended to use this outdoors.
Yes, this can be stained on either side. A box tread is a stair tread with a wall on both sides of the staircase. This tread does not have a bull nose. It is not listed if it comes with knots. A matching box newel and hand rail will need to be selected by the installer as the color is also chosen by the installer. A recommendation cannot be made as it is up to the installer to select what is appropriate to the installer's preferences.
Yes there is a 48" reversible return tread available here. http://www.homedepot.com/p/Stairtek-1-in-x-11-1-2-in-x-48-in-Unfinished-Hickory-Reversible-Return-Tread-REHI1148-XXXXXSY/206178483. If you would prefer a 42" you could special order those through the store. Thank you Stairtek Customer Service.