Windows
	Available Sub Categories Plane Windows      Plane Windows -  UV grade MgF2 & CaF2 (WI)      Plane Windows - BK7A & UV Grade Fused Silica (WI)      Plane Window -  IR Grade CaF2 Parallel Windows      Parallel Window - UV grade MgF2 & CaF2 (PW)      Parallel Window - BK7A & UV Grade Fused Silica (PW) Wedge Windows (WW) Square Windows (SWI) Elliptical Windows (EW) Brewster Windows (BW)