This is replacement bathtub knob for Delta RP17451 (Product info: http://www.deltafaucet.com/repairparts/details/rp17451.html).
I was frustrated with the cheap plastic genuine Delta bathtub handle which cracked and broken after a few months of use. So I designed this new knob and printed in PLA. It feels much stronger than the Delta handle and it has worked perfect since I put it on 3 months ago.
Please notice that the replacement knob uses the exactly same screw, washer and process as Delta RP17451 to install(screw and washer are not included if you print this knob.)
Hope you enjoy this small but sturdy bathtub knob!