Speed Stacks® - Yellow

I am thinking of adding stacks. Would they be legal in front of

Speed Stacks World Sport Stacking Cups 7 Set WSSA 3x Timer Cups 1 Mat Lot Chrome

Speed Stacks Sets (Sport Stacking)

Yellow KSSA Flash Cups

SPEED STACK VASOS - MasKeCubos

Speed Bump - 6', Plastic H-4609 - Uline

Pivotal Commware®

Speedstacking/Speed Stacks Arkiv

Speed Stacks Cups, Set of 12, Neon Yellow

Speed Stacks Stack Pack w/Orange Cups