• Package contents: 4 units of upper guide wheels for folding doors. Size: 5.2 cm x 1.4 cm. • Quality material: Stainless steel and plastic, does not break or rust easily. • Easy to use: Provides spare parts and facilitates installation and repair. • Good performance: Repairs or replaces defective components of folding doors. • Wide application: Suitable for folding, sliding, accordion, closet, barn, pocket, laundry, living room, balcony, entry, partition, shelf, wine cabinet doors, etc.