A broad range of accessories is available including 1,000 hours salt spray test (max The entirely renewed range bis hd clamps consists of type hd 1501 (with noise insulating lining) and type hd 500 (without lining) and includes a clamp for each common pipe size.
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The rubber lining is formed around and through the st el band
It is conjoined with the steel and will not come off when sliding the spiral duct through t the newly designed and patented quick locking system enables safe and easy installation of spiral ducts and venting.
Walraven is a globally active company in the installation industry, founded in 1942 We have always been dedicated to make the work of our customers easier and more effective.
