[Bruceb]

Here are some quotes from the robot manual
STANDARD BUMPERS – Bumper assemblies designed to attach to the exterior of the ROBOT within
the BUMPER ZONE, and constructed as specified in Rule <R08>. STANDARD BUMPERS may weigh
up to 15 pounds, and are excluded from the weight and volume calculations specified in Rule <R11>.

<R08> Teams are required to use STANDARD BUMPERS on their ROBOTS. Bumpers can
reduce damage to ROBOTS when they contact another ROBOT or field elements.
STANDARD BUMPERS have several advantages, such as being excluded from the
calculation of the ROBOT weight and volume limitations specified in Rule <R11>.
STANDARD BUMPERS must be constructed as described below.

<R13> For the purposes of determining compliance with the weight and volume limitations
specified in Rule <R11>, these items are NOT considered part of the ROBOT and are NOT
included in the weight and volume assessment of the ROBOT:
 The 12V battery and its associated half of the Anderson cable quick
connect/disconnect pair (including no more than 12 inches of cable per leg, the
associated cable lugs, connecting bolts, and insulating electrical tape) on board the
ROBOT,
 Any STANDARD BUMPER assemblies included on the ROBOT that are in
compliance with Rule <R08>, up to a maximum of 15 pounds,

Not sure what you are looking at.
Bruce