In the box: Simplet BBC-70 attachment, 7/8” universal brass T valve, braided fill valve, water supply hose, manual, two protective rubber O-rings.
How to attach: Measure from center to center between the two mounting bolt holes on toilet; attachment will fit the length of 5.5”–7.5” between them. The bracket on the attachment can slide to fit the parameters to help ensure a proper fit.
BB-70 attachment recommended for elongated toilets as long as 18 1/16” from front to back of toilet seat or round toilets as long as 16 1/16” from front to back of the toilet seat; it is not recommended for French curve toilets.
It assembled easily and works as it should, but it leaves a gap between the seat and bowl (that is not mitigated by the 2 small pads included) and if one doesn’t sit in just the right position water comes out through the sides of that gap.
I was skeptical due to price point but so far, it has been a fun addition ! I did have my handyman install it - note...have better washers handy as the one that came with it leaked after a few hours (into my smoke alarm system,setting off the whole house!). New washers took care of it. Overall, I am super pleased with this purchase.