Shimano RT-CL800 203mm rotor. I bought this a few months ago, and then finally got around to fitting it onto my bike, which is when I realised I'd stupidly bought the wrong size. So it's never been actually used, as shown in the photos.
SHIMANO Original Disc Brake Adapter PM A Pillar Disc Brake Bracket For 180,203mm
Bicycle Brake Oil Bleed Kit Funnel Oil Stopper For Shimano Hydraulic Disc Brake
Shimano XT Disc Brake Rotor 180mm RT-MT800 Ice Tech CL LOCKRING NOT INCLUDED MTB
Shimano Deore Disc Brake Lever BL-M6100 I-Spec EV Ready LH Left Hydraulic
Shimano J04C Disc Brake Pads X2 Ice Tech Metal MTB Road Bike