Stainless Steel Pergola Brackets, Suitable For 2X4 Beams, Handrails, Fences, And Material?304-stainless steel, black finished; Actual internal size: 1.55 x 3.5"(39 x90mm); Size error: 1mm; It applies to nominal standard 2x 4 lumber on market (Actual size: 1.5 x 3.5"); This item includes 42 PCS stainless steel countersunk screws; All these screws were black finished; This product can be used for joists of Pergola/Gazebo, Handrail, Deck, Pavilion, Log cabin and so on? Note?For visual effect, we plated the products to black, but because of the absorbability of paint on the stainless steel is relatively week, there may be a few of chipped paint, but don?t worry! It won?t get rust;