Probe Accessories 3.5 mm (Compact) Probe System for P6053C, P6133 Opt. 25, P6134C,P6135A, P6136 Opt. 25, P6137, P6138, P6138A, P6139A, P6339A, P6156, P6158and P5050 013-0227-00 50 Compact Probe Tip to BNC Termination Adapter. 013-0226-00 Compact Probe Tip to BNC Adapter (Non-terminated).