BalanceFrom Unisex's Jumping Box, Black, Size: 20 x 24 x 30 inches : Amazon.co.uk: Sports & Outdoors
VEVOR Wood Plyo Box 24 in. x 20 in. x 16 in. Step Up Exercise Platform Puzzle Box Design Plyo Box for Training & Conditioning 24X16X20YCTX00001V0 - The Home Depot
3 IN 1 SOFT PLYO JUMP BOX - 24" X 20" X 16" – gymjunkienz