Wyssen MI 4007 Universal Compass MC 1004 Clinometer Meridian Tripod Attachment for a Prism Compass Meridian Tripod MK-2001 Prismatic Compass Meridian Pole Tripod with Rotatable Head MS-8801 Simple Monopod Meridian Suspension for Pendulum Measuring Instruments Meridian Suspension Ring and Threaded Bracket