Product Details:

Durable metal handle.
Deep, concave pad for easy attachment on curved or irregular nonporous surfaces.
(Not for use on thin, fragile materials.)
Red-line indicator warns user of any vacuum loss.
Check valve allows re-pumping without loss of remaining vacuum.
Release valve lever permits quick and complete release.
Supplied with protective carrying case.
70 Square Inches of Gripping Surface.

The Wood's W6950 Powr-Grip 10 inch (254 millimeters) Vacuum Cup was designed for use on flat and curved glass.
By pumping the steel plunger, the semi-flexible rubber pad reaches its full vacuum.
A red indicator band lets you know if you are in the "safe" range for lifting.
Due to the one inch (25.4 millimeters) protruding rubber lip of this cup, it is not meant for fast application or removal.

Additional Product Information:
This cup has a vertical lifting capacity of 175 pounds (79 kilograms) and a horizontal rating of over 700 pounds (317 kilograms)!
Releasing the immense vacuum is done by depressing the trigger on the opposite side of the plunger.
Made by the most trusted brand of vacuum cups in the world.
Comes with a heavy-duty plastic carrying case.

Size:       10 in (254 mm)
Capacity: 175 lbs (79 kg)

Important Note:
Never exceed the recommended weight limit of this cup.

CAUTION:
Cups must be kept clean and stored in carrying case when not in use.
IMPORTANT:
Small cuts cause leaks.

Use CRL Rubber Conditioning Glycerin to keep your cup in good condition.