General description Product is suitable for dust cover, compatible with 1830, 1840, 1850, 1860, and 1890 lithium batteries. It protects the battery from dust and prevents debris from entering, which could cause a short circuit. Technical specifications Product size: 94mm x 61mm x 25mm Material: ABS Package Contents: 20 dust covers Measurement allowed error: +/- 1-3 cm Other information Color: as shown Note: Light reflection and different displays may cause the color of the item to differ slightly from the real thing.