The Kapro 705 Eagle Optivision Red Box Level has a high contrast ration between the bubble and the vial liquid giving you optimal vision in bright and low light. The bridge of the horizontal vial reinforces the profile and the tilted vial allows a direct line of sight. It is up to 8 x more visible than regular vials, it will save you time, ensure precision and since the liquid in the vial is transparent it will not fade. Extreme building conditions require extreme measures, a strong profile, shock proof end cap, accuracy you can trust and a vial you can easily see. This Kapro 4 Piece 705 Eagle Optivision Red Box Level Set contains: 1 x 705 Eagle Optivision Red Box Level 60cm. 1 x 705 Eagle Optivision Red Box Level 120cm. 1 x 705 Eagle Optivision Red Box Level 180cm 1 x Kapro Cast Boat Level 25cm. 1 x Heavy duty Padded Carr Bag with Strap.