Features: Practical tool: This car windshield effervescent tablet can help you a lot, just 1 piece tablet with 4 liters of water, you will get 4 liters of windshield glass washer, giving a cleanup to glass, greatly reducing the friction of the wiper blade and glass, and comprehensive protection to meet your long-term needs. How to use it: Open the water storage tank of windshield wiper. Put in a piece of windshield glass concentrated washer tablet. Pour water into the water tank. Wash the windshield glass with a wiper. Specification: Size: approx. 0.6 inches/ 1.5 cm in diameter Color: as pictures show Temperature requirements: over than -5 degree Package includes: 60 x Car windshield glass tablets Note: Eye contact: may cause eye irritation, redness, tearing or blurred vision. Skin contact: if touched, it may cause skin irritation, dermatitis, and continuous touch may cause skin to degenerate. Keep out of reach of your children and pets.