40mm. Stainless steel body with thermoplastic covering and hardened steel shackle. 4-pin cylinder. 2 keys supplied. Ideally suited to outdoor applications. Specifications: Body W x H x Th: 40 x 40 x 29mm. Max. shackle W x H: 13 x 25mm. Shackle dia: 10mm. Weight: 0.23kg.