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