Advanced Corner bumper suitable to put it on the any material (wood tables ; concrete stairs ; etc). there is pre-drilled hole for two tipes of screws and textured undersize hash profile for better grip if you want to use some tipe of glue or tape. size is 55 x 55 x 14 mm . thickness of walls are 2.5mm + 5mm for the sides and 3.5 mm for the top side. radius of the corner is 1.5 cm. you can print it with strong and durable materials like PETG or soft end of the spectrum. Flexfill for example. shortest distance between center of the hole and nearest wall is 2.58 cm. those cubes on the glue side of the model are 1mm high. you can send them down to compensate for any iregularities on your stairs for example. happy printing. and create safe place for childrens ;)