We supply a large number of different custom and standard off the shelf shaft collars to our long time customer base, primarily on revolving 12-month blanket purchase order basis. These particular 1" custom stainless steel shaft collars however we supplied to our customer at just 4 pieces. Custom made to his specifications in the USA, we were able to ship them at a relatively quick turnaround. Depending on the material, dimensional requirements, and existing backlog the lead times can vary drastically for these parts.