Variable parameters	Long version			Standard version		Thick version			Short version
Nominal chamber diameter (mm)	150			150		200			150
Mirror bulk length, (L) (mm)	380 ≤ L ≤ 550			94 ≤ L ≤ 360		94 ≤ L ≤ 360			94 ≤ L ≤ 250
Mirror bulk cross section (W × T) (mm)	40 × 60			40 × 40		2 × 60 × 60			40 × 40
	60 × 60			40 × 60		2 × 80 × 40			40 × 60
				80 × 40					80 × 40
Longitudinal leg distance (mm)	400			300		300			220
Transversal leg distance (mm)	220			220		270			220