Dubro 2 1/4" Spinner (2 Blade) Black

This is the Dubro 2-1/4" Diameter Black Spinner.

FEATURES:
Constructed of 100% Virgin Nylon for optimum strength.
Pre-trimmed for 2 blade propeller.
Uses a unique nylon insert lock design for attaching the backplate
    and spinner-giving a strong and protected hold.
Four shaft adapters, 6mm, 1/4", 7mm, 5/16", removes have to drill
    out backplates.

INCLUDES:
One Dubro 2-1/4" Diameter Black Spinner with backplate, 4 shaft
    adapters, and 2 3.5mm x 18mm socket head cap screws.

REQUIRES:
Aligning pins in nose cone to backplate and attaching into pre-
    installed locknuts with the 2 socket head cap screws.
7/64" ball motorist

SPECIFICATIONS:
Diameter: 2.25" (57mm) at base
Length: 2.44" (62mm) from backplate to tip

Lots of others have gotten this product in addition to the product that you are presently reviewing.

12x6 Sport Propeller

This is a 12x6 Airplane Propeller. It is a "tractor" (not a "pusher") Prop.

FEATURES:
Computer-optimized design offers these props a thinner profile
    and more "bite" with less noise.
Lightweight formed nylon building and construction minimizes rotating mass for
    greater output and longer life.
Reinforcing carbon fibers assist preserve true, continuous pitch at
    Any RPM.
"C2" design (see COMMENTS).

CONSISTS OF:
One Carbon-Reinforced NYLON Propeller

REQUIRES:
ALL props require balancing, this is ESSENTIAL, use TOPQ5700.
May need prop reamer, use GPMQ5005 (SAE) or FOXQ1520 (Metric)

SPECIFICATIONS:
Length: 12" Pitch: 6
Density at hub: 1/2" Hole size: 1/4"

COMMENTS:
The "C2" means the production run in which it was made.