These exciting hand drums from Remo come in fun shapes and vibrant colors. Each drum is pre-tuned and mounted in Remo's Acousticon®. They're lightweight and very portable. 3 x The Circle Family Pack has five circular Sound Shapes™ (6", 8", 10", 12", and 15"), and the Shape Pack has five Sound Shapes™ (9" triangle, 6.5" x 9" rectangle, 9" square, 9" round, and 9" half-round).
All in a Suitable for Sound Shape Family Pack, frame drum, tambourine and buffalo Drums Hand Drum Bag 16''

https://remo.com/products/product/sound-shape-circle-pack/

https://www.inspire-works.co.uk/remo-sound-shapes