50-Hole Positioning T-type Ruler ring Unlike traditional headphones

Unlike traditional headphones

The whole body is sleek

COMPATIBLE: Be compatible with the most of pool filter cartridge in the market (filter not included)

Style: casual

To activate the lights you must follow 2 steps:

50-Hole Positioning T-type Ruler ring Unlike traditional headphonesFEATURES Made of aluminum alloy, it is wear resistant, rust proof and durable. Dimensions that can be used as parallel lines. Precise scale, clear, wear resistant and rust proof, durable. Simple structure, simple operation, high precision and wide application range. Find the hole corresponding to the scale, insert the pen inside the hole and draw the desired line. SPECIFICATIONS Model: T50 Mini Scriber Material: Aluminum Alloy Size: about 68*40*9mm 2.