Precision Optical Experiment One-Way Fine-Tuning Blade Manual Adjustable Slit

Precision Manual Adjustable Slit Optical Experiment One-Way Fine-Tuning Blade

Manually Slit Unidirectional Fine-tuning Knife Edge for Optical Experiments

SL-B7 Ophthalmic Universal Slit Lamp Breath Shield Large Thick Acrylic 13" x 11"

Precision Optical lab slit 20um x approx 4mm.

SL-B6 Universal Slit Lamp Breath Shield Small Thin Acrylic 8 1/4" x 8 13/16"

Laboratory Adjustable Slit

SL-B4 Universal Slit Lamp Breath Shield Small Thin Acrylic 5 1/2" x 4 1/4"