Screw caps with free movable insert made of PTFE. Depending on the version, for connecting capillaries (O.D. 1.6/2.2/3.2 mm) and hose olives for tubing with I.D. 5.5 to 8 mm. A b.safe exhaust air filter can be screwed into the thread GL 14 (not included in the scope of supply).
Scope of supply: Fittings: 4 x 1.6 mm, 4 x 2.2 mm, 4 x 3.2 mm, 3 x blind fittings (UNF ¼"), 1 x hose olive (NPT 1/8")