SVL Screwcap,for sliding joints,thread SVL 30,to accept tubing O.D. 17.6 - 22.

SVL? Screwcap,for sliding joints,thread SVL? 30,to accept tubing O.D. 17.6 - 22.5mm
PBT screwcaps with hole designed to provide a sliding joint
Ideal for inserting thermometers and glass tubing, etc. into an SVL? system
Screwcaps allow a wide range of tubing diameters 4.0 to 32.8mm to be used
Used in conjunction with sealing rings manufactured from PTFE sheathed silicone rubber