Picote Tornado Original chain (18 mm shaft) with hardened stainless steel links - all sizesPicote Tornado Original chain (18 mm shaft) for hard deposits in cast iron pipes etc all sizes Features strong hardened stainless steel links instead of carbides. These chains are long lasting and ideal for descaling and removing hard deposits inside cast iron pipes. 1380185100T DN100 18 mm 1380185150T DN125 150 18 mm 1380185200T DN200 18 mm 1380185250T DN225 250 18 mm 1380185300T DN300 18 mm