When you combine a Wood’s Powr-Grip® Cup with a compressed air supply, the result is a tool that provides a better way to manually handle glass on production lines. The W4950A1R Vacuum Cup attaches quickly without any pumping, and it never needs to be re-pumped during operation. The red-line vacuum indicator and continuous vacuum source also make this vacuum cup much safer than the slap-on suction cups sometimes used in such settings. The 8" (203 mm) diameter vacuum pad is supplied with a protective Carrying Case. Compressed air required at 3 SCFM (85 liters/minute) at 80 psi (550 kPa).