Fletcher Protect Fireseal Party Wall Batts - 5000 x 300 x 4 50mmPROTECT Party Wall stonewool batts and blanket are constructed from non combustible stonewool and are specifically designed for fire rated building elements, such as party or separating wall constructions between adjacent tenancies in Class 1 buildings. Specifications Thickness Dimensions Pieces per pack Lineal metres per pack 50mm 5000mm x 300mm 4 20 Applications PROTECT Party Wall stonewool blanket are intended for use where the NCC requires the use