The 35315 anchor kit is an option when purchasing the UTBASE Base Kit for the UT20 and UT30 towers, and it may be purchased separately, at a later date, as a replacement item. The 35315 contains three 3/4-10 x 30.48 cm (12 in.) long 316SS bolts, as well as a package of anti-seize lubricant. The included lubricant will help prevent galvanic corrosion between these anchor bolts and the aluminum clevises of the UTBASE.
The 35315 is considered an option to enable you to source your own anchors if you desire to use a different material, style, or anchor length. Campbell Scientific recommends exercising caution when sizing user-provided anchors to ensure your tower is properly anchored.