High Quality Pocket Coil Spring for Sofa Seat and Mattress Core with Independent Support Design Product Descriptions Product Name Pocket Spring Of Sofa Inner Spring Unit Material High Carbon Steel Wire Wire Diameter 1.0mm-2.3mm 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