This product is. MCN46si MCN45si MCN43si Exclusive Base mount that fits into the hole in the bike's stem. For racer type bikes without bars. Made of aluminum. Bar mount REC-B48-BB 12-13/13-14/15-17/17 -19/23-25mm either Arm BB-94 or BB-62 Head parts BB-ZU 3-piece set Comes with a BB-CN (resin) adapter for fixing a digital camera *Aluminum version must be purchased separately BB-CN -A BB-CN-K BB-GP-A, etc. Since this is a mail-order only product, it comes in simple packaging and a simple instruction manual. Please use it with a strap or other measures to prevent it from falling. Screws to secure the navigation system are not included.

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Manufacturer: ‎Rec-Mounts
Brand: ‎Rec-Mounts
Product size: ‎14.61 x 12.29 x 4.5 cm; 240.4 g< br>Product model number: ‎B48-1213-M-ZU
Product dimensions: Depth x Width x Height: ‎14.6 x 12.3 x 4.5 cm
Product weight: ‎240 g