STAUFF round steel U-bolts and flat steel U-bolts with and without plastic pipe saddle / saddle. For common diameters of between 25 and 521 millimetres. Manufactured from uncoated steel, galvanised, blue-chromatised steel. Alternatively also available in stainless steel V4A 1.4401 / 1.4571 (AISI 316 / 316 Ti). Pipe saddle material: polypropylene PP and polyamide PA. Horizontal or suspended fixing of tubes on steel beams, profiles and brackets. The design with two threads enables them to be adapted ideally to the precise outer diameter of the tubes.