Shop › Loose Cannon 7.5" Gear Guards Set Image 1 of 1 Loose Cannon 7.5" Gear Guards Set $25.00 3D Printed Gear Guards made to fit PMI Hub. Multiple Color Variations available. Color: Black white green red orange cyan yellow pink gray purple Add To Cart Added! 3D Printed Gear Guards made to fit PMI Hub. Multiple Color Variations available.