Thick 304 stainless steel, with hook, sliding trough expansion, front and rear adjusting range 220-400 mm, left and right adjusting range 295-565 mm Adjustable in length, good quality, sturdy construction, ensures a secure hold for your microwave, oven, gril Non-slip special screws and four-corner fixing groove can firmly hold the microwave oven to prevent swaying and use more firmly304 Stainless Steel Strong Bearing Strength, Perfectly used for long time. Color: silver Mounting hole diameter: 10mm drill hole punching installation Type: 304 normal Size: (as below, mm/inch) Front and back regulation range 220-400 mm, left and right regulation range 295-565 mm Type Telescopic large distance * small distance Height * width Package Included:1PC * Microwave shelf 4Pcs * Expansion screw 4Pcs * Plastic foot mat