This fishing rod holder is made out of stainless steel (V4A) and it is naturally steady against water and ultraviolet radiation. The holder is provided with a clamp so it is easy to stick to nearly everything, it is 360° pivoted ,too. The black rubber in the inside protects the fishing rod also from turning around. measurements: entire-length:395mm pipe-Ø:50mm maximum-installationlength:102mm minimum-installationlength:33mm strength of the clamp:8mm