Multi-sized springs fit for different sizes probe, choose according to the probe grounding post size.
The inner diameter of 3.5mm is suitable for probes with a grounding post of about 3.8mm. Suitable for Tektronix TPP0051, TPP0100, TPP0101, TPP0200, TPP0201, P6139B, P5050B, TPP0250, TPP0500B, TPP0502, TPP1000.
The inner diameter of 4.3mm is suitable for probes with a grounding post of about 4.5mm. Suitable for RIGOL RP2200, PVP2150, PVP2350.
The inner diameter of 4.5mm is suitable for probes with a grounding post of about 4.8mm. Suitable for Tektronix P2100, P2200, P2220, P2221; for Agilent 10073C, 10073D, N2862A/B, N2863A/B; for UNI-T UT-P01, UT-P02, UT-P03, UT-P04, UT-P05, UT-H01, UT-H02, UT-H03, UT-H04, UT-H05; for SIGLENT PB470, PP510, PP215, and other probes.
3 Sizes for choice: 3.5mm, 4.3mm, 4.5mm (optional)