Special sponge-flame retardant sponge

Special sponge is a special kind of sponge, one of which is flame-retardant sponge. The function of flame-retardant sponge can prevent burning. Special sponge is a special kind of sponge. One of them is flame-retardant sponge and flame-retardant sponge. It can prevent burning. Special sponge is a special kind of sponge. One of them is flame-retardant sponge. The function of flame-retardant sponge can prevent burning. Special sponge is a special kind of sponge. One of them is resistance. Burning sponge, the function of flame retardant sponge can prevent burning