U Packer 1mm Yellow (500/Box)

Yellow U Packers for the precise positioning of window and door frames. They can be easily slid around existing fixings without removing screws, helping to maintain accurate datum and line during set-out.Each packer is colour-coded for quick on-site identification. The rigid, non-compressible polymer provides a stable bearing under typical frame loads, while the internal comb design ensures a secure grip that resists movement during tightening and final fixing.The material is non-absorbent and non-staining, ensuring a clean, professional installation against both frames and substrates. These U shaped shims are optimised for fine adjustment and micro-shimming where millimetre precision is essential. They are ideal for closing hairline gaps and building height in small, controlled increments without disturbing existing fixings.Each packer can be used individually for delicate packing or stacked as required to achieve exact heights. Their consistent bearing surface maintains a true plane, protecting frame profiles and finishes throughout installation.The 1mm thickness is particularly suited to fine alignment and light packing applications.