Description Specifications: Material: Zinc alloy Color: Chrome Fitting for glass door: Thickness 4-6mm Hole in the door: Dia16mm Features: - Prevent vivarium access and animal theft. - Can be used with pre-drilled holes in the glass door. - Easy installation, easy operation, stable and safe. Package included: 1 X Lock 2 X Keys Notice: 1.Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. 2.The colors may have different as the difference display,pls understand. 1. I will add a tracking number in 2. Make sure your Address is correct. A phone number is recommended for a more accurate delivery. 3.We try our best to provide you the most reliable, affordable way of shipping service. But sometimes international delivery is highly depended on the local customs and post service. If you do not receive your item on time, please contact us immediately for further assistance. We will be responsible for any damages or losses incurred in the shipping process.