Independent Mini Pocket Spring Unit with Reinforced Steel Edge Wire for Mattress Comfort Layer Sofa Seat Cushion Custom OEM Advanced micro pocket spring technology designed to provide superior spinal alignment and pressure relief for premium mattress applications. Product Specifications Product Name Micro Pocket Spring Unit Material High Carbon Steel Wire Wire Diameter 1.0mm-1.8mm Head Diameter 3cm Middle Diameter 3cm Height 2cm-6cm Turns 4-7 Turns Coils Counts According to