IT IS A EASY ASSEMBLY CAT TREE--it is very easy to put together,it will take about 10-15 minutes to assembly them as you follow the installation instruction. IT IS VERY STABLE TO STAND ON FLOORS—This multi level Pet Play House is steady for cats to jump on and off.Cats will feel safe and interesting to play on slide. IT IS FUN FOR CATS--Cats will like to play on and around it,sleep on it.Great unit for scratching,climbing,sleeping,and exercising. COLOR IS LOVELY AND ATTRACTIVE AND WELL MADE--It has a nice, big platform at the top,They can use it as a perch to look out the window. MULTI-LEVEL DESIGN--Different size cats houses and platforms.Suitable for 0-12 pounds kittern.

These sets include the head, base, and upper end gaskets They are designed for piston replacement Made in the USA