... the sponge we use for our products is of high density which ensures the durability, but usually, others ... require it.3) Frame, other manufacturers construct the frame with 1.0mm thick aluminum, but all our products are ... .4) Rust proof, insect prevention, stale proof, anti-high temperature. About us: 1, Our factory is more than ... UK, ( BC-003-BF) Rattan Bar Stool, Rattan Bar Chair For Bar and Restaurant