Amazon.com : PENTAX Battery Grip D-BG8 Black for Pentax K-3 III Flagship DSLR Dust-Proof and Weather Resistant Construction with Capacity to Hold Additional D-LI90 Battery (37048) : Electronics
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Pentax D-BG6 Battery Grip for K-1 at KEH Camera
Pentax Battery Grip D-Bg2 | eBay
K-3 Mark III APS-C-Format DSLR Camera Body, Silver with Pentax HD PENTAX-D FA 70-210mm F4 ED SDM WR Lens with Pentax D-BG8 Battery Grip - Walmart.com