PrimeLine D 1804 Carvel Double Roller Sliding Door Top Guide Peachtree

All nylon construction, Two 1-5/16 inch nylon rollers, The square bracket design straddles the wood frame with the two 1-5/16 inch nylon rollers sitting askew from each other, It is held onto the wood framed patio door by 2 wood screws through the mounting holes in the bracket, Provides smooth operation of the patio door