The Japanese-designed IGT Four Unit Frame is made of aluminum and serves as the starting block for the modular Iron Grill Table System. Use the four units of space to customize cooking and prep surfaces, then pair with your preferred leg height.Shop our other frame options for various heights or Build Your Own set through our step-by-step guided experience. FEATURE Four IGT Unit Connection Hook Compatibility Slide Rail Attachment CONTENTS Frame MATERIAL Aluminum Alloy Stainless Steel