ITEM NAME:Radius gauge Compact design R7 - 14.5mm 32 sides Caliber to radius inside a D9F6 Radius gauge Compact design R7 - 14.5mm 32 sides Caliber to radius inside a D9F6 Radius gauges require a bright light to be measured behind the object. The meter is placed on the edge to check and tune any leakage of light between the blade and edges, a Nichtueber that requires a correction. It's kind of an observation because of its visual inspection way. There are 16 pcs of blades at each end, the measuring range contains 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm, 10.5mm, 11mm, 11.5mm, 12mm, 12.5mm, 13mm, 13.5mm, 14mm, 14.5 mm. Product Name: Radius Gauge R7 standard: 14.5 mm Color: Silver Tone Material: metal Size (folded): approx. 8.1 x 2 x 0.8cm / 3.2 x 0.8 x 0.3 inch (L * W * T) Number of blades: 16 x 2 pieces ends Net weight: 74 g Contents of the packaging: 1 x radius gauge Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..R7 standard: 14.5 mm. Size (folded): approx. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.