DETAILS: Specially mixed and color-tuned silicone to provide a simulated touch and reliable quality. High-quality durable materials and UV-oil spraying post-process for long-term use. All keycaps are suitable for Cross axis mechanical keyboard。 MATERIALS: - Soft Elastic Silicone Shipping： Normal express delivery usually takes 15-20 days, Fedex takes about 6-12 days. The return policy of my store is that the buyer is responsible for the cost of return and shipping. In addition, please ensure that the goods are in good condition if you need to return them. If you have not received your item after the expected delivery date, please contact me and I will usually get back to you within 24 hours. How do we pack it： we place it in a sturdy box and wrap the box with tape again. to make sure it will arrive to you safe and sound. If you have any questions regarding compatibility or about the keycaps themselves please contact us!