Such Quartz Thermal Block with designed feedthrough holes is used with GSL-1500X-RTP50 RTP furnaces.

Inspect your delivery:
Please check the package for damages before accepting delivery.
Should damages found, please keep all packaging materials, take pictures, and report immediately to carrier/MTI.

No Warranty:
Kindly note this item is a consumable part, and not covered by warranty. Make sure to inspect for defect(s) thoroughly before use.