Metering device Seal Back Catalog number: 11-3830 Availability: In the manufacturer's stock Price on request - + Recommended 11-4116 Sample Needle Kit, 15µL Price on request 11-2401 Check Valve Cartridge, Ceramic Ball & Seat, 2/pk Price on request CTS-11380 2690/2695 Performance Maintenance Kit w/Seal Pack Price on request