Map for Mutual Materials Co. Map for Mutual Materials Co. Search | Advanced Search | New Members | Coupons and Discounts | All Categories Other >> Division 04 - Masonry >> 04 70 00 Manufactured Masonry Mutual Materials Co. 6721 E Trent AveSpokane Valley, WA 99212 | directions Chris Sergott (509) 922-4505 Visit Site