YK801 FEATURES: MATERIAL: high-intensive and high-hardness Aluminum alloy, electric-coating finish ALUMINUM ALLOY: more than 1.1MM thick SPECIAL DESIGNING：Net linking-moving lam branch structure is designed to be used in the bottom of this model. This designing shares the depression and weight to enhance the useful life of the door hardware, as well as beautiful decoration purpose. WHEEL COVER：Imported 304# stainless steel material DRIVING & ASSISTANT WHELL：High-intensive and high-hardness Aluminum alloy material.，imported Nylon coated, TWO-LINKING BEARING.