Round Tubing Min. ø 1 cm (0.4”) Diameter Max. ø 5 cm (2.3”) Diameter Max Circumference Of Pushchair / Stroller Frame- 15cm's The board is designed to easily be attached to the upright tubing of a stroller Once installed there are 2 quick release clips for detachment. Many Adjustments so the ride on board is compatible with all kinds of Pushchairs / Buggies / Strollers. Textured anti-slip standing area Board Dimensions- 42 Width x 22cm Depth x 16cm Height (From Ground) Saddle Height from saddle seat to ride on board-24cm (lowest setting) - 27.5cm (middle setting) - 31cm (highest setting) Maximum Weight 20kg Assembly Instruction included!