This STARTER PACK set from CYMPAD Optimizer offers all the attenuators you need to equip and enhance the sound of your cymbal set in 1 purchase. Made from HD memory foam, these CYMPADs optimize the resonance of your cymbals and minimize foot contact. This set includes: - 3 attenuators 40/15 for crash or splash cymbals. - 3 hi-hat attenuators (two for top cymbal; one for bottom cymbal) - 1 attenuator 40/18, 18 mm thick, especially for large, heavy cymbals such as ride or crash.