The hammock is the piece the whole range circles back to. On its own it is a swinging bed your cat can sink into, and strung together with others it becomes a soft path across the wall. Set up off the floor, it also doubles as a bolthole, a spot to duck away from a dog, a toddler, or a bossier housemate, which does wonders for a nervous cat.It is built to grow with you. The modular hardware ties into bridges, shelves, and scratching poles, and you can bolt on a feeder or planter attachment down the line. Each kit ships with a pair of bamboo mounting planks, your choice of heavyweight cotton canvas or clear vinyl, and all the hardware. Pick 18 or 34 inch for 16 inch studs, or the 26 inch for 24 inch spacing.