These are the Dubro Park Flyer Snow Skis.

Features

Molded black plastic.
Lightweight with spring action.

Includes

Two skis
Two springs
Four 1/16" wheel collars
Two #2x1/8" set screws
Two #4x1/2" cap head screws

Requires

Drilling, mounting, and 3/32" allen wrench (can use GPMR8002)

Specifications

Length: 178 mm (7")
Width: 54 mm (2.125")
Height: 25.4 mm (1")
Weight: 30 grams (1.05 oz)