MAINS Straight Line ropes have long been the standard for the waterski community, in fact, more records have been pulled on a Straight Line rope than all other ropes combined. SL ropes are manufactured with 16 strands of 64 fibers each and utilize what is called an “S” and “Z” counter twist to give the rope better balance and strength. This specific construction process creates an equilibrium of both weight and performance. SL ropes are pre-stretched and tolerance checked under AWSA specs. Non-detachable sections. Waterski Mainline Diagram 8 Section 1010 Made with 3/8" Polypropylene with fully detachable and marked sections down to 39.5' off. Ideal for recreational through Advanced level course skiers. FIND IT NOW 5 Section 2040 Made with ¼" Polypropylene with fully detachable sections down to 32’ off. Ideal for recreational through Intermediate level course skiers. FIND IT NOW 10 Section XX10 Made with 3/8" Polypropylene with fully detachable and marked sections down to 43' off. Ideal for recreational through Pro level course skiers. FIND IT NOW Perfect Pass XX16 Specifically designed to work with the Perfect Pass Slalom switch system. This mainline starts at 15' off and can get as deep as 44' off. Non-detachable sections. FIND IT NOW