This product, if used normally within three years, will be replaced by us if it gets damaged. Explosive pressure 90KG, does not merge at high temperature, does not crack at low temperature. Free replacement for quality issues within one year. If there are quality issues, we will respond within 2 hours and resolve within 3 hours after receiving the notification! 15865783886 available 24 hours, welcome your call. 1. Genuine products from the manufacturer. EYCOM is our company's brand. Please recognise the trademark to avoid being deceived. 2. About sizes. Yitong high-pressure pipes specifications: inner diameter 6.5mm-25mm, length 20-100 metres, can be custom-made according to customer requirements. 3. About colours. Yitong high-pressure pipes are available in red, blue, yellow, green, black, etc., and can also be custom-made according to customer requirements. 4. About customer service. 15865783886 available 24 hours, welcome your call. 5. About after-sales service. If there are quality issues, we will respond within 2 hours and resolve within 3 hours after receiving the notification! 6. About delivery. Our company ships through designated logistics, and we will deliver the goods safely and quickly to the specified location.