Square sponge rubber tube or square sponge rubber with holes Square section design for rubber seal, waterproof, dustproof, heat shockproof, etc. Due to the closed-cell sponge rubber, the external surface is smooth. Suitable for use in a variety of industries such as Automotive, Oven Seal, Glass Edge Seal, Waterproof Seal, Shockproof Seal etc. Along with the raw materials with silicone EPDM NBR CR (neoprene) and NR meet the specific applications for each industry.