The gas cooktop is made of stainless steel,It has the characters ofanti-rust,difficult deformation and easy to clean. Product Features Direction 1.The product size and cut holesize are shown in the insert pictures. There are four typeof burners: 3.3kw triple Ring work burner,2.75kw Rapid Burner,1 or 2 1.75kw Semi Rapid burner,1 kwAuxiliary Burner?which will meet all your need in cooking . 2.The cast iron grates are heavy and stable, coated with enamel , which make it hightemperature resistance and not easy to rust. 3.This gascooker is convertible for NG and LPG and we offered the conversion kit andregulator for free. We suggest you to invite professional to do theinstallation. Function 1,The gas hob takes 110 V AC power ignition withsafety device, but if without AC power, it can ignition with lighter or otherflame. 2. The gas cooktop has 100% inspection of gas leakage andvalves inspection before it is packaged 3.The gas stove top has oneyear guarantee . 4.If you have any other requirement on products orservice, please leave your message in our Customer Questions& answersin the website.