Medium Density (N23-130) foam Swabs, foam pigs are made from polyurethane foam. Swabs and Pigs are used for cleaning pipelines, cleaning debris and scrubbing the pipe walls. Foam bolsters are used in construction and plumbing making them ideal for sealing and filling applications. We specialise in custom-cut diameters for foam pigs. Please send us email : orders@actfoam.com.au for custom- cut diameters, lengths and in different density foams (Dunlop EN 36-130, HR 40-230, Dunlop Dry flow Soft/Firm Outdoor foam).