Modulo solare fotovoltaico 20 cm - staffa montaggio binario tetto piatto estremità/morsetto centrale set
Rail length: 20cm. For 2 solar panel, you need 6x rail+4x end clamp+2x middle clamp. For 6 solar panel, you need 14x rail+4xend clamp+10x middle clamp. For 1 solar panel, you only need 4x rail+4x end clamp.