INSTONE MANUFACTURING INC operating as a corporation is licensed in California under CSLB number 738175. The license was first issued in 1997, putting the business at 29 years on the active CSLB roster. It carries a single CSLB classification: C-54 — Ceramic and Mosaic Tile Contractor. Records show an active surety bond on file with AMERICAN CONTRACTORS INDEMNITY COMPANY and active workers' compensation coverage from MASSACHUSETTS BAY INSURANCE COMPANY. The business is based in SAN LEANDRO, in Alameda County, California.