PLEASE READ ME! Please take care in measuring and selecting the correct size of belt. Extract and squeeze the belt together, measure its length then double it to give you the belts total length. Note: Do Not Order using the Length value. From the tables listed, read off the diameter. This is the value used in our codes. Choose the next size down if the belt is stretched. The thickness is a measure of the cross-section of the belt. If the belt is missing or damaged beyond recovery then you could duplicate the belt by running a piece of string around the mech' and use its length as a general guide. Please take advantage of our discount structure. The belts are available individually but are 10% cheaper if bought in bag quantities of ten (No mixed values). WHEN ORDERING QUOTE THE DIAMETER & THICKNESS ONLY e.g. 195x0.5x5 195mmØ, 0.5x5mm thick. (612mm long) 80x1.2 80mmØ, 1.2mm thick. (251mm long)