This suction cup is very useful and powerful when installed correctly on the right finishes. On glass or smooth non-porous materials, it can hold 20 lbs. The rubber is soft and low durometer, lower than typical low cost suction cups. Our design has a backing shroud (cup) that holds the rubber in place as the suction is applied while the nut is tightened. Our color options are a white shroud cup with black rubber and nut. The clip is high performance ABS with stainless steel wire and spring.