All packs are made up of 2×4, 2×3, 2×2 & 2×1 brick sizes.
Packs are 1kg in size (approximately 540 pieces) and are made up of 4 different colours.
The Prime pack is made up of the following 4 colours : Red, Blue, Green, Yellow
This Combo is made up of 1 Prime Bricks pack and a Yellow 10″ x 10″ baseplate
100% compatible with all other major brands