S7901 standard dovetail plate size screw hole is 12CM for guide mirror bracket

S7901
Length: 12CM
Height: 14mm
All aluminum alloy, customized guide mirror and star mirror
Suitable: 60, 75, 90 star guide mirror bracket
Bar spacing: 20MM
Screws available: M6 (3 pieces), 1/4 inch (3 pieces)