Fisherbrand™ Thin PTFE Sleeve manufactured by Thermo Fisher Scientific is microthin (0.05mm) polytetrafluoroethylene film which features tapered elongated cones to fit snugly around glass joints.
Specification
For Use With (Equipment):Glass joints Product Type :Glass Joint Sleeve Temperature Range (Metric):-75 to 260°C Thickness:0.05mm Standard Taper Joint No.:40/50 Height (English):1.96 in. Material:PTFE Width (English):1.57 in.