Head to head

Tool Aid 34300 vs OTC Deluxe Compression Tester Kit

Our pick

OTC Deluxe Compression Tester Kit

Compression Test Kits

Why this one

The included adapters and deep-well connector give you options for connecting to different spark-plug openings on gasoline engines.¹²

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Product photographs. Not to scale.

What Tool Aid 34300 offers

Choose the Tool Aid 34300 when you want 10, 12, 14 and 18 mm adapters together with a molded case and a repair kit containing O-rings, valve cores and an installation tool. Check the exact adapter and engine application before use.³

What differs

Specification	Tool Aid 34300	OTC Deluxe Compression Tester Kit
Adapter sizes	10mm, 12mm, 14mm and 18mm³	with a 14-mm fitting on the end. OTC also includes 10-, 12- and 18-mm adapters¹
Gauge units	0-300 PSI and 0-21 BAR³	0 to 300 PSI and 0 to 2,100 kPa¹

More details

Specification	Tool Aid 34300	OTC Deluxe Compression Tester Kit
Hose length	Not published	25 in¹
Deep-well adapter	Not published	Yes²
Dial size	Not published	Not published
Case	Hard case³	Hard case²
Spare seals included	Yes³	Yes²
Gauge protection	Not published	Yes²
Engine type	Gasoline⁴	Gasoline²
Maximum gauge reading	300 psi³	300 psi¹