. lar Plastics Inc. GOSH North 55th Street, Oak dale, MIN S5128 HRITTO-202K Letter of Guarantee Manufacturing Practices Polar Plastics, Good manufacturing practices are adhered to i all production departments producing: ¥ Clear High-Clarity Poly Firm > Clear All-Purpose Plastic Sheeting > Black Mulch Film Quality Assurance Numerous steps have been taken to assure our customers of high quality film.