UHMW Polymer (plastic) is a linear polyethylene with a molecular weight in the range of 3,000,000 to 6,000,000. This value represents the "average molecular weight". UHMW is 10 times heavier than regular high density polyethylene. Use this UHMW to make jigs and fixtures for your table saw , router table, etc. Also use the 3/4" x 3/8" plastic strips to make sliding table jigs for your table saw, band saw or router table. Please note: the size of each piece will vary slightly due to the kerf of the saw cut. In most cases it will be slightly under the 4" x 46" measurement