Apex Enterprises offers Wrap Block of Drum Circumferences 1 - yard / meter. Apex Enterprises covers areas of sheet metal work, welding and machining, as well as skilled mechanical, electrical and electronic assembly workforce. Wrap Block of Drum Circumferences 1 - yard / meter is designed to measure silver and roving to determine hanks. The drum circumferences are 1 - yard / meter with 10", 12", 14", 16" and 18" width which facilitates roving bobbins from 8" to 16" lift respectively. The measuring surface is ground and highly polished which is fitted with a reset able digital counter.