CRS tubes (BTX),100ng, pk/10 Back Catalog number: C-BTX100-10 Manufacturer: MARKES INTERNATIONAL LIMITED Availability: 2 weeks Price on request - + Recommended R-FLTR4 Filter, carbon, 30mm × 30mm,pk 4 Price on request U-DISK4 Filter, disk, sintered PTFE, 3.2mm section,pk10 Price on request SERUTD-5065 Split filter tube, SS, 3 1/2 ", pack with charcoal Price on request