Venom Super Carve Bushings
Blue 78a (Softest) Orange 81a (Softer) Yellow 85a (Soft) Purple 87a (Medium Soft) Red 90a (Medium) Green 93a (Hard)
Glow in the Dark 95a (Medium Hard) Pink 97a (Hardest)
 
Each quantity of 1 purchased is a single bushing. You have 2 trucks per skateboard, & each truck takes 2 bushings. So for a complete skateboard, you need to buy a quantity of 4.