90mm (3"1/2) Suction Cup

Features:
Suction cup
Starter pin 
16mm (5/8") O.D outside diameter
90mm (3"1/2) O.D outside diameter
3/8 male threads type of fastening
Stainless steel 
Black anodized
High-strength aluminium alloy

Includes:
1 piece 90mm (3"1/2) suction cup
1 piece 80mm (3"1/4) length - starter pin 16mm (5/8") 
1 piece 1/4 grub screw stainless steel
1 piece 3/8 grub screw stainless steel

Note: The suction cups should never be stored activated; they should always be stored in their resting position.

Maximum load capacity - 7.3kg includes a 3:1 safety factor and requires the following: attachment on clean, smooth, nonporous flat surfaces; a minimum vacuum level of 17½" Hg [-59 kPa]; and a friction coefficient of 1. This rating is based on tests of new hand cups attached to the upper, horizontal surface of static objects in ideal conditions. Many factors can reduce the capacity, including: lifting a load when the cup is attached to a vertical or inclined surface; or lifting a load that applies leverage to the cup.