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Plastic Hole Liner Sleeves w/Caps are for use in obtaining Relative Humidity Measurements through insertion into 0.625in (16mm) boreholes in concrete floor slabs to hold RH BluePeg Probes. Either model can be cut to length as required. The included low-profile caps seal the openings. Sleeves can be optionally used with CTA-19 Liner Sleeve Top Extenders when working with shallower slabs to ensure a tight seal against moisture.
CTA-18 Plastic Hole Liner Sleeve is 1.8in (45.7mm) length and used to properly position probes in conventional 4in (101.6mm) thick floor slabs. Ten CTA-18 sleeves are also included with the CT-50 and CT-51 Concrete Humidity Measurement Kits.
CTA-20 Extra Long Plastic Hole Liner Sleeves are 3in (76mm) long and for use with thicker slabs.
CTA-17: 1.8in (45.7mm)
CTA-20: 3in (76mm)
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