The world famous OX Accelerator furnace bake-coated with Molybdenum & PTFE for Progressive Lubrication & Rapid Acceleration. With up to 40% more compressed poundage than conventional mainsprings.
Fits BSA Meteor, Milbro Diana G80 and 27, Norica, Baikal, Cometa 300/400 plus 5, 50, 100, 220 with coils remove, most SMK models.