Masterline 5 Loop MainlineMasterline 5 Loop Mainline The Masterline 5 Loop Mainline is a recreational water ski mainline built from 60 strand Poly P rope at 70' total length. The 5 take off sections at 15', 22', 28', 32', and 35' off cover the line lengths most recreational skiers run as they progress from basic skiing into course style shortening. The mainline pairs with any standard ski handle and floats reliably between rides built as a sharp priced entry into shortened