Lifespan Kids Small Climbing Rock Set 4 (Yellow, Red, Blue, Green)Turn any outdoor play wall into a cliff face for young climbers to conquer with this Small Climbing Rock Set. The set comes with 4 small sized climbing rocks in red, blue, green, and yellow. Rock climbing improves upper body strength and dexterity, and is so much fun for kids. Technical Specifications Dimensions: 10cm x 6. 8cm x 4. 4cm; 10cm x 6. 5cm x 4. 4cm; 10cm x 6. 6cm x 3. 9cm Does not come with Hardware. Recommended to use M6 Galvanised Bolts,