SKLZ Spin Vision Softball Size:One Size replacing the classic D and

replacing the classic D and EE widths

New HEAD technology means the ski

Prizm™ clear

torso and hips through a variety of exercises with the SKLZ Core Wheels Ab Trainer

Matthew Knies

SKLZ Spin Vision Softball Size:One Size replacing the classic D andFocus on the basics and improve your overall throwing technique with these four seam throw trainers. The striped ball turns purple when thrown to give instant feedback on revolutions per minute. Ball will only turn purple when using proper throwing form to promote better arm angles. Color changing design makes practicing the perfect fast ball fun for youth athletes throw after throw. While the white ball features a black rotation guide and raised