HJ3 W provides high quality Micro Caplillary --Glass Ferrule which can be modified to customer specifications and cut to specific lengths. Tolerances of +/-0.5 microns of inner diameters, but custom sizes with tighter tolerances are also available. Dimensional Guide: Fig.1&2 A: Overall Length+/- Tolerance B: Depth of Counter Sink of Lead-In+/- Tolerance C: Counter Sink or Lead-In Diameter+/- Tolerance D: Outer Diameter+/- Tolerance E: Inner Diameter+/- Tolerance For counter sink+lead-in: Fig.3 A: Overall Length+/- Tolerance B: Depth of Counter Sink of Lead-In+/- Tolerance C: Diameter of Counter Sink+/- Tolerance D: Outer Diameter+/- Tolerance E: Inner Diameter+/- Tolerance F: Diameter of Lead-In+/- Tolerance G: Depth of Lead-In+/- Tolerance Applicatin: Collimator, Isolator, DWDM, etc. Example (Unit: mm) Description Glass Ferrules ID 0.126～0.128 ID Tolerance -- OD 1.0～3.0 OD Tolerance +/-0.005 Length 4～10 Length Tolerance +/-0.20 Material Borosilicate