Tender For corrigendum : supply of spares for ftirspectrophotometer d d - caf2 polished rectangle window- 38.5mmx19.5mmx4mm, undrilled suitable for ftir , caf2 polished rectangle window- 38.5mmx19.5mmx4mm, drilled suitable for ftir. , dispersive _rectangular aperture_ demountable cell without window contains full liquid cell with holder gasket, teflon plug without windows suitable for ftir. , teflon_ ptfe spacers- 38.5mmx19.5mm, pk_12 for 0.025 mm thickness. , teflon_ ptfe spacers- 38.5mmx19.5mm, pk_12 for 0.05 mm thickness. , teflon_ ptfe spacers- 38.5mmx19.5mm, pk_12 for 0.1 mm thickness. , teflon_ ptfe spacers- 38.5mmx19.5mm, pk_12 for 0.2 mm thickness.