TG162 Circular Compression Platens With Linear Bearing Guides This circular compression fixture features linear bearing guides to maintain parallel alignment of face plates during testing. Maximum sample diameter 115 mm (4.53 in). Capacity: 2.5 kN, 562 lbf Packaging: Complete fixture Applications: Ideal for compression testing of corrugated materials such as cardboard and paper products. The test specimen is placed in the fixture with the flutes perpendicular to the platens.