Filter, carbon, 30mm × 30mm,pk 4 Back Catalog number: R-FLTR4 Manufacturer: MARKES INTERNATIONAL LIMITED Availability: In the manufacturer's stock Price on request - + Recommended C-CHK10 Check-standard, 90 ng/µL (nominal), Tenax TA,pk10 Price on request C-CF020-XZ Long-term stor cap,brass,6mm&PTFE ferr,pk 20 Price on request C-UNS100 Unions, 1/4 "–1/4 ", SS&1/4 " PTFE ferrs,pk100 Price on request