KATRIS is different. It's a modular cat tree/ climbing tower/ condo furniture system for both cats and owners. It is multi-functional, modular & versatile. It can be changed up in endless new combinations and formations, providing new play and scratch options so that your cat won’t get bored. It designed in the USA, made in Taiwan from sustainably sourced (90% post-consumer content + FSC-certified paper). Made of heavy-duty cardboard that is extremely durable – holds up to 300 lbs weight! Each block dimensions(in inches): O shape=16 x 8 x 16, L shape=24 x 8 x 16, T shape=24 x 8 x 16, Z shape=24 x 8 x 16, I shape=32 x 8 x 8. Different style can match any interior and exterior furniture style, Available collections includes Mono Black, Mono White, Real Wood Teak, Real Wood Maple, and City SF collections.