**Please Note: This vacuum head needs to be assembled. The butterfly spring is not assembled!**This is a quality made vacuum head that is very inexpensive. The vacuum head is ease to use, fits standard 1-1/4-inch and 1-1/2-inch vacuum hoses, extra-wide 14-inch head, has 8 wheels and is weighted head that helps it stay submerged.----------Swimline Corp. is a family owned and operated business. Founded in 1971 Swimline has grown to be the largest manufacturer of above-ground swimming pool liners in the world. In addition Swimline Corp. is the largest importer of in-ground and above-ground swimming pool covers and related accessories.