15 Speed ropes. Check.

Mid and heavyweight options for developing ridiculous double under ability. Check.

The most complete jump rope system available. Check.
Includes:

12 sets of CrossRope Quick Handles 3 sets of CrossRope Rugged Handles
6 Sprint 15 Speed 3 Stamina 2 Explode
1 Power 1 Strength 1 Titan

Comes with recommended size assortment:
Sprint: 1S, 1M, 3L, 1XL
Speed: 2S, 3M, 7L, 3XL
Stamina: 1M, 1L, 1XL
Explode: 1M, 1L
Power: 1M
Strength: 1XL
Titan: 1L
(Alternate custom sizing offered upon request).