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