Custom Height 4-6 Inch Pocket Spring Unit for Sofa Back Cushion and Seat Support Product Descriptions Product Name Pocket Spring Of Sofa Inner Spring Unit Material High Carbon Steel Wire Wire Diameter 2.0mm(Can Be Customized) Head Diameter 4-6.5cm Middle Diameter 4.5-7.5cm Height 6-25cm Turns 4-7Turns Coils Counts According to the demand of clients MOQ Negotiate Woven Fabric 65-100g/㎡Or Can Be Customized Size Any Size Available Color White, Blue Or Customized Packing