Product Details:

Durable Metal Handle and Metal-Clad Plunger
Plunger Emits an Audible Warning to the User and Others, in the Case of a Vacuum Loss
Fast Attachment on Smooth, Nonporous Flat Surfaces
Red-Line Indicator Provides User With Visual Warning of Any Vacuum Loss
Available in Diameters of 8", 9" and 10" (203, 229, 254 mm)

These new CRL Wood's Powr-Grip® Vacuum Cups automatically turn an Audio Alarm on or off as necessary, increasing battery life and simplifying operation. The Audio Alarm is powered by a long-lasting, easy-to-replace AAA battery (included). The check valve allows re-pumping without loss of remaining vacuum. Release valve lever permits quick and complete release. Supplied with protective carrying case.

Diameter: 9 in (229 mm)