Abstract: A spirit level made of two identical halves is disclosed. The halves are each in the form of a web with marginal flanges and spaced openings. Each opening receives a level vial and a recess is provided in the web at each end of each opening receiving the ends of the level vials.

Abstract: A line level made of two substantially identical halves molded from thermoplastic material. Each half has an internal surface in the shape of a part of a cylinder which co-operates with a like surface on the other half to receive an end of a level vial. The ends of each half are rectangular and a cylindrical level vial is sandwiched between the halves with its ends resting on the internal cylindrical surfaces. Each half has an outer rectangular surface and a pintle extending inwardly on one end and a hollow boss on the other end which receives the pintle on the other half. An energy director is formed on the one half on the edges that engage the other part for ultrasonically welding the parts together.