Tungsten Lamp Back Catalog number: 11-3343 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-4052 Needle Seal, SIL-30AC, SIL-30ACMP Price on request CTS-10692 HPMV Gold Seals, 2/pk Price on request CTS-11425 Sapphire Plunger Price on request