This two-way spirit level aids the level parking of a caravan trailer or motorhome Suitable for internal or external use it features a durable weatherproof construction in a compact pocket-size design This triangular levelling device is a small but essential accessory and great value for money Two pre-drilled holes for permanent installation - Can be used freestanding or fixed to vehicle - Fully weatherproof - Size 45 mm x 57 mm - Twin spirit level for accurate horizontal & vertical positioning