Polly Foam Pig / 清潔管道內用海綿珠
https://www.chungwahmetal.com/shop/zwds-waterwork-pfp-polly-foam-pig-qing-jie-guan-dao-nei-yong-hai-mian-zhu-61780
https://www.chungwahmetal.com/web/image/product.template/61780/image_1920?unique=29033e5
BS 6920 (HOKLAS lab tested)
Light Density
Brand: GD / UK