I made this as a solution to save myself from spending $60-70 on an horn ring! This part holds the "NRG" style horn button on an "NRG" style wheel, while adding a 2.2mm spacer(really small). It fits between the wheel and the hub. This item is made with PLA with an 100% infill. This does not include the horn button, steering wheel, or hub.  The product was stress tested before being listed for sale.  Here is a writeup on how I did that.