The Nikon 3-9x40 Team Primos BDC has a tube diameter 1 in (25.4mm).  It has a Magnification (Actual) 3x-9x with an  Exit Pupil of 4.4mm.  Its length 12.3" with an Objective Diameter of 40mm. Specifications : Weight 13 oz. Tube Diameter 1 in (25.4mm) Magnification (Actual) 3x-9x Exit Pupil 4.4mm Length 12.3" Objective Diameter (mm) 40 Reticle BDC Adj. Graduation 1/4 MOA (1-click) Max. Internal Adj. 55 MOA Parallax Setting (yds.) 100 Eye Relief (in.) 3.7-3.6 FOV@100 yds. (ft.) 33.8-11.3 Objective O.D. (mm/in) 47.3/1.86 Eyepiece O.D. (mm/in) 41/1.61

Shipping Dimensions Weight: 1.25 pounds. Dimensions: 2.955" (W) x 2.955" (H) x 13.99" (D) Weight Disclaimer: * Weight may vary based on configuration.

Product SKU: 46360