WL6-3413 Protective Case

The outer shell is 339 x 310 x 125 mm and the internal cavity is 310 x 255 x 106 mm. Externally the case occupies 339 x 310 mm of bench or shelf space while the usable floor inside is 310 x 255 mm, the difference coming from the wall section and the moulded closing geometry. Size a load from the inner dimensions, never from the outside, because outside figures overstate capacity. The 106 mm inner height is the maximum upright height available, and any lining you add reduces it further, so allow for that when the insert is designed.

The shell uses a sealed closure and provides an IP67 waterproof and dustproof rating. For instrument transport the closure keeps out both dust and moisture, which limits contamination of connectors and optical surfaces. The rating applies to the sealed cavity of the case itself, so if you store moisture-sensitive contents, pair it with desiccant or a humidity management accessory and check the sealing face for trapped debris every time you close the lid, since a single trapped fragment undermines the seal.

The factory usage categories listed for WL6-3413 are precision instrument cases. Suited to moving meters between workshop and laboratory, storing calibration fixtures, and carrying portable test sets on site. With a 310 x 255 x 106 mm cavity and a unit weight of 1680 g it works best as fixed-station storage or a vehicle-transport case that needs protection from moisture, dust and knocks, rather than as a container left permanently outdoors.

Both share an identical 339 x 310 mm footprint. This model is 125 mm high outside with a 106 mm inner height and a 1680 g unit weight, while WL6-3416 is 155 mm outside with a 138 mm inner height, a 4.8 mm wall and an 1800 g weight. Choose on content height alone: up to 106 mm take this model, above that take WL6-3416, and both can share one pallet plan. The two models are not a step up from one another but a division of labour by content size: measure the height of the contents first, then the floor area, and confirm pack quantity and carton size last. Applying the same order when an insert is designed avoids reworking a lining because the case body was fixed too early.