Why choose us? Curved concave design: make the cat more comfortable and safer when lying down Pine wood frame: original wood color design, in line with your home style Iron bracket: manual welding, safe and firm Strong PVC suction cup: firmly adsorbed on the smooth surface 100% natural sisal: high density, durable and scratch resistant Maximum load 30lbsHow to Install? Step 1: Install the two suction cups on the brackets of the both sides of the board, Step 2: Install the other two suction cups on the both sides of the lower bracket, Step 3: Mount the lower bracket to the board, Step 4: Clean the surface of the contact surface with a damp cloth, Step 5: Adjust the position of the suction cups to keep the 4 suction cups parallel up and down, which is the most stable state, Step 6: Press the suction cup hard and squeeze out the air as much as possible, Step 7: Finished.Tips for install: Tip 1: Put the suction cups into warm water(60?) for 5 minutes to increase suction. Especially in winter, the sucker is easy to harden! Tip 2: When the position of the four suction cups is exactly square, the force at this time is the largest and it is not easy to fall off.Product parameters: Product Name: Cat Hammock Sisal Cat Scratching Board 2 in 1 Model: PB-CH02 Color: Wood color Material: Pine + natural sisal + iron bracket + PVC suction cup Product size: 16.5*11.8*2.6 in Product weight: 3.97lbs Maximum load: 30lbs The package contains: 1* Curved hammock and upper bracket 1* Lower bracket 4* Suction cups 1* Brand card