Based on this product's specifications, here are some alternatives and similar models
Adjustable rack shelf INTELLINET Techly I-CASE TRAY-140BK, 19" (48.3 cm) width 400 mm, load 25 kg, black
Summary description:
Adjustable rack shelf INTELLINET Techly I-CASE TRAY-140BK designed for 19" (48.3 cm) server racks. Black steel shelf with 400 mm usable width and maximum static load capacity of 25 kg. Measures suit standard rack mounting, weighs 3.5 kg and ships as a single unit. Suited for mounting network equipment, small servers, UPS or cable management accessories.