K1 is Kastaplast’s super durable material with a nice combination of firmness and gumminess. Discs in K1 Line are available in both solid and translucent colours.

K1 Soft is similar to K1, but flexier and grippier. Just as with K1, this plastic comes in both translucent and solid coloUrs.

K1 Glow has the same properties as the durable K1 Line but is powered with a long lasting glow-in-the-dark effect.

K3 is Kastaplast's base plastic – grippy in all conditions. With this plastic you will get that nice worked in feel quickly. Compared to other base plastics, K3 is medium soft.

K3 Hard is the stiffer version of K3 Line. The firmness makes this line more durable than the original K3, giving it a slower aging process.

K3 Glow is made of the same plastic as the K3 line with a mix of glow plastic, but due to the properties of base plastic it has a lesser glow-in-the-dark effect than the K1 Glow.

K1 Hard has the same polished and gummy feel as K1, but it’s slightly harder, doesn’t beat in as fast, and it gives the disc a touch more stability. K1 Hard is a tour series disc exclusive.