ADJ. Telescopic Props: Adjustable Steel Dura Props: Quick erection Repeated use Long life Strong and safe Compact storage Technical Details: Steel tubes continuous welded Conforms to IS 1239 / 1161 YST 210 Outer 60.3mm O.D. / 50mm NB medium Inner 48.3mm O.D. / 40mm NB medium Heavy Duty props with 'C' class tubes Special locking electrogalvanised pin, cannot be removed from prop assembly Beam Props special ring welded to avoid damage to threading while dropping Protective coat paint given additionally at bottom and top inner. Head and Bottom Plate 6mm Thick