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Product name: hidden door hinge Hidden door hinge invisible hinge hidden hinge zinc alloy 180 degree swing hinge 3-way adjustable butt hinge (2 hinges) Description: 100% brand new and high quality Features: Duct model: NG-H40 three-dimensional adjustable regardless of left and right Main material: zinc alloy Technical parameters: 1. Two hinges, load-bearing: 40KG /60KG 80KG 2. (40KG/2PCS) size: 150mm x 25mm (60KG/2PCS) size: 140mm x 30mm 3. (80KG/2PCS) size: 165mm x 30mm 4. Color: black/silver Features: Beautiful installation, the hinge cannot be seen after the door leaf is closed, more suitable for external opening invisible door, external opening background wall hidden door; the distance between the door leaf and the door frame is small, with anti-pinch function! 1. Suitable for wooden doors, swing doors, aluminum alloy doors, fire doors, security doors, soundproof doors, anti-theft doors, etc. 2. Hidden installation 3. Three-dimensional adjustable range: up and down ±3.0mm, left and right ±2.0mm, front and back ±1.0mm, can be adjusted without removing the door 4. Opening degree: 180 degrees 5. Overall material: zinc alloy embryo + aluminum alloy core 6. Main surface treatment: spray paint, sand nickel, sand chrome, pearl nickel, pearl chrome, Qing Gu, Hong Gu, etc. Notes: 1. Due to light and screen differences, the color of the item may be slightly different from the picture. 2. Due to manual measurement, please allow 0.5-2 cm difference. Package includes: 1 set of anti-theft door concealed hinge black/silver