Tudor™ wardrobe and timber sliding doors are covered here by one part, a 60mm plastic floor guide, which also replaces Robe Runner™ guides of the same pattern. A guide-only listing points straight at the fault. The door hangs from its top track, and the floor guide is the plastic piece that keeps the bottom of the leaf in line. It wears through where the door edge rubs, splits at the screw fixing, or works loose, and the door then swings at the bottom and scuffs the jamb. The 60mm in the title is the identifying dimension. Measure your existing guide end to end and check the groove width in the bottom of the door before ordering, since robe and timber door guides come in several sizes that look much the same.