1) Bottom mounting drawer side 2) Material: cold-rolled steel 3) Material thickness: 0.8-1.2mm 4) Specially made side mounting self-closing drawer slides 5) When the drawer works to the end of 60mm, the drawer will self-close 6) Various colors available: pure white, off white, brown, black 7) Sizes available: 10" , 12" 14" 16" 18" 20" 22" 24" 8) ABS wheel, silence noise wheel, green silence noise