Vacuum package Quartz 55x60x750mm Quartz work tube package for vacuum comprising: Extended length work tube: Ø55 ID Ø60 OD x 750 mm quartz Radiation shields Work tube end seal with NW16 vacuum flange + 3 mm thermocouple gland Work tube end seal with NW25 vacuum flange (compatible with low vacuum pump package) End seal plate with NW40 vacuum flange for 60 mm OD work tube or ISO-K 63 vacuum flange for OD > 60 mm + work tube (compatible with high vacuum pump package) Guards and horizontal tube supports for extended length work tubes