These British Standard smooth grey Kerbs use hydraulic pressing to ensure consistent long-term performance for an integral unit of this type; Marshalls BN3 Kerbs conform to BS EN 1340:2003 dimensions and have a BullnoseThese British Standard smooth grey Kerbs use hydraulic pressing to ensure consistent long-term performance for an integral unit of this type; Marshalls BN3 Kerbs conform to BS EN 1340:2003 dimensions and have a Bullnose profile edge. Use alongside other Marshalls ancillary products for a seemless integration with minimal cuts. ...View more