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