YD ELECTRONICS&reg; Main Case O-ring for iPhone 4/4S Lifeproof Cases -Set of 2 Fits Lifeproof Cases for iPhone 4/4S YD ELECTRONICS Brand (Reg. U.S. Pat. & Tm. Off.) not OEM Perfect replacement to overhaul your case. GINZATRONICS is the sole distributor for YD ELECTRONICS and ship in our propietary packing. We ship within 24 hours from Los Angeles, California from our warehouse, no drop sales, no shipments from China.