Probe (sheath) diameter

Source: https://baymeters.com/products/option-set-1653966-dropdown-4

VariantPriceAvailability
Φ8mm10.00 USDIn Stock
Φ8mm Core-Pull Type10.00 USDIn Stock
Φ10mm Core-Pull Type15.00 USDIn Stock
Φ16mm Core-Pull Type24.00 USDIn Stock