3 m rod a- shaped arm 3 m rod conch arm 4 m rod a- line arm 4 m large and small rod conch arm 5 m rod a- shaped arm 5 m large and small rod conch arm 6 m rod a- shaped arm 6 m large and small rod conch arm

arc always bright 20000 + rainy days still bright the arc surface is always bright 30000 + it is still bright in rainy days curved surface always bright 50000 + rainy day still bright curved surface super bright 60000 + rainy days still bright curved surface super bright 80000 + rainy days still bright the arc surface is bright 100000 + it is still bright in rainy days the arc surface is bright 150000 + it is still bright in rainy days the arc surface is bright 200000 + it is still bright in rainy days