Comparison : Item # 0003G-4112, KRS-5 Rod 40mmx3mm (1.575" x .125"), 45o tip angle
Item # 0003G-4113, KRS-5 Rod 50mmx3mm (2.25" x .125"), 45o tip angle
Item # 0003G-4114, KRS-5 Rod 75mmx6mm (3.25" x .25"), 45o tip angle
Item # 0003J-4115, ZnSe Rod 40mmx3mm (1.575" x .125"), 45o tip angle
Item # 0003J-4116, ZnSe Rod 50mmx3mm (2.25" x .125"), 45o tip angle