Kupo is a strong, durable and versatile tension pole system that does not require permanent fixing. It can be used in floor to ceiling installations (82-1/2" to 145-1/2") and adapted for freestanding applications."L" Bracket Shelf Holder: Attaches to Kupo donut. Set of 2. Use with custom wood shelves or cabinets. Measure 6-1/2" x 1-1/2" deep x 1-1/2" high (17cm x 4cm x 4cm).