Suyash Preci - Lap Aids supplies Plain and Serrated Carbide Comparator Base. Suyash Preci - Lap Aids is an ISO 9001: 2008 certified company. The Plain and Serrated Carbide Comparator Base is available in superior flatness and high class surface finish. The Carbide Comparator Base is designed to suit Comparator Stands of sizes ranging from 0 mm to 170 mm. The Comparator Base comes in the diameter size of 50 mm, 75 mm, 62 mm and 150mm.