According to the manufacturer this light fixture comes with a swivel on the canopy which allows it to hang on sloped ceilings. They don't have any max or min slope for this product as they haven't really had any complaints in regards to this product.
We recently renovated our kitchen and I wanted Island lights and a light for over the sink that match stainless steel with glass in a beige/tan color. After searching all over the internet I found these. The nickel finish works great with stainless and the beige glass casts a warm glow. Excellent value for the price and they look great in our kitchen. Shipping was timely and they were easy to assemble and install.