Description: mini-quartz grooved poles from an unique manufacturer in the world. Pole specs are: 1.8mm Ø / 48mm length. Groove is square design 0.75mm (bottom) x 0.90mm (walls). Very fine high end machinery (see first picture edge-on under my Wild loupe). Used in laser R&D.

Technical info: http://www.qualityquartz.com/qqaclear.htm

Condition: new in original opened bag.

Quantity: price is for one unit ONLY.