VacPlate This item was sourced on www.MFG.com as one of the items in an RFQ in USA for Surface Grinding Blanchard Grind Top & Bottom to the following tolerances: FLAT .005” PARALLEL .008” Make from 6061-T6 approx 21.00” x 21.00” x .4375” thick. Please include Teflon Hard Coat finish in quote. Part Part Number: LEX511-VAC01 Material: Aluminium Material Grade: Aluminum 6061 Technical Specifications Category:Surface Grinding Dimensions0.0 x 0.0 inch Annual Usage:6.0 Get quotes online for manufacturing services at MFG.com from machine shops, fabricators, job shops and contract manufacturers. MFG.com connects buyers and suppliers when the buyer has a need and the supplier has the right expertise and capacity. MFG.com analyzes all engineered parts and RFQs for improved manufacturability and to ensure quality and a quick quoting experience. Surface Grinding: Surface grinding, commonly called flat grinding, is the process of removing extremely small amounts of material from a flat surface of a part, be it top, bottom or sides. Surface grinding is done primarily to produce fine or smooth finish surfaces. Often it is a pre-finishing treatment done to better accept coating or painting. Surface grinding is also done to achieve tight tolerances for flat, parallel or square dimensions.