Pra.Ma.

Crucibles for all common MBE systems and effusion cells are available in a variety of sizes and materials:

	1.		Tantalum
	2.		Molybdenum
	3.		Pyrolytical boron nitride (PBN)
	4.		Tantalum (thin wall)
	5.		Beryllium oxide (BEO)
	6.		Quartz
	7.		Tungsten
	8.		Pure graphite
	9.		Pyrolytical graphite (PGR)