Note: 4 inch hinge thickness is 2.0mm, the 5 inch hinge real thickness is 2.7mm. This price is 2PCS, one door to use at least 2pcs, please the quantity of correct choice. Brand new invisible door hinge, spring hinge door hinge Material:304 Stainless steel The new invisible door hinge, spring hinge hinge behind closed doors Color: Silver Suitable for: Can be used for home furniture such as door cabinet, wardrobe or other industrial and commercial places. Suitable for any installation ordinary families hinge doors Package contains: 2x Hinge