We offer the best quality Compression Jigs in the market. The jig is designed for the flexural testing of 40 x 40x 160 mm mortar prisms. The frame is fitted with a ball seating assembly to which is attached the upper roller bearers. The jig assembly is designed for the compression testing of 40 x 40 x 160 mm mortar prisms. The frame is fitted with a single upper self-aligning bearer and two lower bearers, one self-aligning. The jig can be used on the complete range of Compression Testing machines.