These can be made to any size at very short notice in our in-house workshop, from the extensive range of cords we list. Standard general-purpose cords are normally extruded to Class E2; it follows therefore that Cord Rings produced from this range will have a greater cross section tolerance than that of a moulded O-Rings. The reverse however applies to our special purpose cords, which are specially extruded to a very tight tolerance. Our Viton and Silicone cord is Class A1, with a tolerance that is less than that of a moulded O-Rings. Cord Rings with a 3mm to 12mm cross section are produced with a 45˚ scarf joint and Cord Rings above a 12mm cross section are produced with a 90˚ butt joint. Cord Rings are generally produced on a 4 to 5-day lead time subject to workload. However, we can offer an express 24-hour service, meaning your order will be prioritised above others and produced to ship the day after the order is received.