reversing warning shot
1, dimension: φ 60mm
2, material: steel
3, color: black and yellow and white
is to prevent vehicles entering the parking spaces, due to the effect that the line of sight or the driver and rear-end collisions caused by vehicles set.
warning shots using φ 60 galvanized steel pipe, steel plate welded together, coated with rust and yellow and black paint, and connected with expansion bolts.