Suitable for all SUPERELASTIC FLEXTRACT tubes with left-hand threads. PVC end-piece Ø 38 mm (for SUPERELASTIC Ø 38 mm), PVC end-piece Ø 50 mm (for SUPERELASTIC Ø 50 mm), PVC connector Ø 38 mm (for SUPERELASTIC Ø 38 mm), PVC connector Ø 50 mm (for SUPERELASTIC Ø 50 mm), combi-end-piece PVC (inside: Ø 50 mm smooth and thread for PVC tube Ø 38 mm).