OMS 140mm Wide Distance Stainless Steel Twinning Bands A16610423 Pair of Extra Wide OMS Stainless Steel Cylinder Bands to fit  5, 7, 8.5 Litre Steel Cylinders with a diameter of 140mm. Manufactured from Marine Grade 3162 Stainless Steel and supplied complete with all Bolts, Washers & Nuts. For Sturdy Construction of a Diving Twin Set and secure attacment to B.C.D's and Tech Weight Harnesses, extra Width provides additional Stability.