1/4" Tripod Screw to Flash Hot Shoe Mount Adapter Black
From the Manufacturer:It you can installflash to camera tripodProtect the hot shoe from scratching, keep it clean, and avoid   moistureLightweight and small size, convenient to carryA must-have   useful accessory for photographersHigh quality and durable in   useColor: BlackDimensions:1.57 x 1.02 x 0.71inch/4 x 2.6 x 1.8cm(L x W x H)Includes:1 x Hot Shoe Cover Cap