Package Contents: you will receive 4 pieces of gas level indicators, the sufficient quantity and simple designs can satisfy your various decorating needs, which has a color scale that changes according to gas level | Size Information: magnetic gas level indicators measure about 10 x 6.3 cm/ 4 x 2.5 inches, small and lightweight, easy to store and take with you on the go, without taking up too much space | Quality Material: propane gas gauge tank indicators are made of quality PET plastic, liquid crystal, soft magnetic, sturdy and solid, firm and strong, not easy to break, deform or bend, can retain its color and shape after long time use | Easy to Use: they are easy to use, what you have to do is to open the magnetic gas residual test strips, place them on the gas hydraulic tank and wait about 10 minutes for the value to be displayed | Wide Application: gas gauge tank indicators are easy to dismantle and are suitable for outdoor travel, camping, barbecues, boating, hiking, etc., which can meet your diverse needs