This document summarizes the key details of a test corners product: 1. The test corners are used for temperature rise testing and have dimensions of 800x800x1000mm. 2. It can measure the temperature at 48 points, covering 100x100mm areas with thermocouples less than 0.3mm in diameter. 3. The test corners consist of plywood covered in non-light black paint and gray film board, and include a set of corners, spare brass plates, and thermocouple wiring.