Technical Overview of a Plastic Board with Specific Dimensions and Features

a plastic board with a thickness of 5mm, width of 8cm, length of 40cm. there are rails on the length sides, with thickness of 3mm, and 2.5cm tall. there's a hole at the middle of the board, the hole is a circle of 5mm diameter, where the center is 20cm from the width and 4 cm fromthe side, with a part cut off, so that the hole is a straight line with an arc, the longest distance between the middle of the straight line to the arc is 4.5mm. the straight line is facing the width side, A plastic board with specific dimensions and features. The board thickness is 5mm, width is 8cm, and length is 40cm. Rails are present on the length sides, with a thickness of 3mm and a height of 2.5cm. A hole is located in the middle of the board. The hole is circular, 5mm in diameter, centered at 20cm from the width. A section is cut off for the hole to create a straight line facing the width side, with an arc. The longest distance from the middle of the straight part to the arc measures 4.5mm